CEFR Level
C1
Welsh — Advanced Vocabulary
2,000 words
Can understand a wide range of demanding, longer texts, and recognize implicit meaning.
| # | Word | Type | IPA | Definition |
|---|---|---|---|---|
| 1 | ... ydw i | Ymadrodd | /ˌədu ˈiː/ | my name is ... ((literally) I am ...). |
| 2 | (y) mis bach | Enw | ||
| 3 | → English: sewin | Enw | ||
| 4 | → English: Sylfaen | Enw | ||
| 5 | aaron cri gyddfol | Enw | razorbill (Alca torda). | |
| 6 | abergofiant | Enw | /ˌabɛrˈɡɔvjant/ | forgetfulness. |
| 7 | aberthgedau | Enw | /ˌabɛrθɡɛdaɨ̯/ | |
| 8 | absenoldebau | Enw | ||
| 9 | academyddion | Enw | /ˌakadɛˈməðjɔn/ | |
| 10 | ach y fi | Ebychiad | alternative spelling of ach-y-fi. | |
| 11 | achwyniadau | Enw | /ˌaχʊɨ̯nˈjadaɨ̯/ | |
| 12 | achyddiaeth | Enw | /aˈχəðjaɨ̯θ/ | Equivalent to 'Genealogy': The descent of a person, family, or group from an ancestor or ancestors; lineage or pedigree. |
| 13 | aciwbigwraig | Enw | ||
| 14 | ad-daliadau | Enw | /ˌad.dalˈjadaɨ̯/ | |
| 15 | adainredyn y chwarelau | Enw | parsley ferns (Cryptogramma crispa). | |
| 16 | adar bwn Tsieina | Enw | ||
| 17 | adar cariad gwridog | Enw | rosy-faced lovebirds, peach-faced lovebirds (Agapornis roseicollis). | |
| 18 | adar cariad wynepgoch | Enw | ||
| 19 | adar cloch Awstralia | Enw | ||
| 20 | adar cloch barfog | Enw | ||
| 21 | adar cloch gwynion | Enw | ||
| 22 | adar cloch gyddf-felyn | Enw | yellow-throated miners, white-rumped miners (Manorina flavigula). | |
| 23 | adar cloch gyddf-foel | Enw | ||
| 24 | adar cloch swnllyd | Enw | ||
| 25 | adar drycin bach | Enw | little shearwaters (Puffinus assimilis). | |
| 26 | adar drycin Cory | Enw | Cory's shearwaters (Calonectris borealis). | |
| 27 | adar drycin du | Enw | sooty shearwaters (Puffinus griseus). | |
| 28 | adar drycin Manaw | Enw | Manx shearwaters (Puffinus puffinus). | |
| 29 | adar drycin mawr | Enw | great shearwaters (Ardenna gravis). | |
| 30 | adar gyddf-felyn Bahamas | Enw | ||
| 31 | adar gyddf-felyn Belding | Enw | ||
| 32 | adar gyddf-felyn Chiriqui | Enw | ||
| 33 | adar gyddf-felyn corunllwyd | Enw | ||
| 34 | adar gyddf-felyn cycyllog | Enw | ||
| 35 | adar gyddf-felyn cyffredin | Enw | ||
| 36 | adar gyddf-felyn mygydog | Enw | ||
| 37 | adar gyddf-felyn penddu | Enw | ||
| 38 | adar haul euradain | Enw | ||
| 39 | adar haul gwarlas | Enw | ||
| 40 | adar haul gyddflas | Enw | ||
| 41 | adar hirewin Abyssinia | Enw | ||
| 42 | adar hirewin bronfelyn | Enw | ||
| 43 | adar hirewin Fülleborn | Enw | ||
| 44 | adar hirewin Grimwood | Enw | ||
| 45 | adar hirewin gwridog | Enw | ||
| 46 | adar hirewin gyddf-felyn | Enw | yellow-throated longclaws (Macronyx croceus). | |
| 47 | adar hirewin Pangani | Enw | ||
| 48 | adar hirewin Sharpe | Enw | ||
| 49 | adar morgrug cefngoch | Enw | ||
| 50 | adar morgrug cennog | Enw | ||
| 51 | adar morgrug wynebddu | Enw | ||
| 52 | adar o'r unlliw | Enw, Ymadrodd | /ˌadar ɔr ˈɨ̞nɬɨ̞u̯/ | birds of a feather. |
| 53 | adar tomen Papwa | Enw | New Guinea scrubfowl, New Guinea megapode (Megapodius affinis). | |
| 54 | adar y bwn | Enw | /ˌadar ə ˈbʊn/ | any bitterns (bird of the subfamily Botaurinae in the heron family, Ardeidae). |
| 55 | adar y ddrycin | Enw | ||
| 56 | adar y llin | Enw | linnets (Linaria cannabina syn. Carduelis cannabina). | |
| 57 | adar y si | Enw | /ˈadar ə ˈsiː/ | hummingbirds (Trochilidae spp.). |
| 58 | adar y to | Enw | house sparrows (Passer domesticus). | |
| 59 | adar yr eira | Enw | starlings (Sturnus vulgaris). | |
| 60 | adargraffiad | Enw | /ˌadarˈɡrafjad/ | Equivalent to 'Reprint': A book, pamphlet or other printed matter that has been published once before but is now being r… |
| 61 | adaryddiaeth | Enw | /ˌadaˈrəðjaɨ̯θ/ | Equivalent to 'Ornithology': The branch of zoology that deals with the scientific study of birds. |
| 62 | adduned Blwyddyn Newydd | Enw | New Year's resolution. | |
| 63 | addurngylch | Enw | ||
| 64 | addurniadau | Enw | ||
| 65 | addysgiadol | Ansoddair | /ˌaðəsɡˈjadɔl/ | educational, educative (instructive, didactic). |
| 66 | adeiladaeth | Enw | /ˌadei̯ˈladaɨ̯θ/ | construction. |
| 67 | adeiladaethau | Enw | /ˌadei̯laˈdeɨ̯θaɨ̯/ | |
| 68 | adeiladwaith | Enw | /ˌadei̯ˈladwai̯θ/ | construction (act or manner of building). |
| 69 | adeileddiaeth | Enw | /ˌadei̯ˈlɛðjai̯θ/ | constructivism. |
| 70 | adeinefydd Prydain Newydd | Enw | New Britain bronzewing (Hemicophaps foersteri). | |
| 71 | adeinefydd y Dwyrain | Enw | squatter pigeon, partridge bronzewing (Geophaps scripta, formerly Petrophassa scripta). | |
| 72 | adeinefydd y Gogledd | Enw | partridge pigeon, bare-eyed partridge bronzewing (Geophaps smithii, formerly Petrophassa smithii). | |
| 73 | adenedigaeth | Enw | /ˌadɛnɛˈdɪɡaɨ̯θ/ | rebirth, regeneration. |
| 74 | adenilladwy | Enw, Ansoddair | recoverable, receivable, salvageable. | |
| 75 | aderyn drycin Cory | Enw | ||
| 76 | aderyn drycin Manaw | Enw | ||
| 77 | aderyn pen tân | Enw | ||
| 78 | aderyn tomen copog | Enw | ||
| 79 | aderyn y bwn | Enw | /aˌdɛrɨ̞n ə ˈbʊn/ | singulative of adar y bwn. |
| 80 | aderyn y cnau | Enw | ||
| 81 | aderyn y ddrycin | Enw | singulative of adar y ddrycin, an alternative form of adar drycin (“shearwaters, petrels”). | |
| 82 | aderyn y frochell | Enw | ||
| 83 | aderyn y llin | Enw | ||
| 84 | aderyn y pâl | Enw | ||
| 85 | aderyn y si | Enw | ||
| 86 | aderyn y to | Enw | ||
| 87 | aderyn yr eira | Enw | ||
| 88 | adfeddiannu | Enw, Berf | /ˌadvɛˈðjanɨ/ | to repossess. |
| 89 | adfeiliadau | Enw | /ˌadvei̯lˈjadaɨ̯/ | |
| 90 | adfeiliedig | Enw, Ansoddair | /ˌadvei̯lˈjɛdɪɡ/ | ruined, in ruins, decayed. |
| 91 | adferiadwyr | Enw | /ˌadvɛrjaˈdəðwɨ̞r/ | |
| 92 | adferiadydd | Enw | /ˌadvɛrˈjadɨ̞ð/ | restorative. |
| 93 | adferiedydd | Enw | /ˌadvɛrˈjɛdɨ̞ð/ | |
| 94 | adferteisio | Enw | ||
| 95 | adlewyrchiad | Enw | /ˌadlɛu̯.ˈərχjad/ | Equivalent to 'reflection': The act of reflecting or the state of being reflected. |
| 96 | adlewyrchydd | Enw | /ˌadlɛu̯.ˈərχɨ̞ð/ | reflector. |
| 97 | adnabyddant | Berf | /adnaˈbəðant/ | |
| 98 | adnabyddiaeth | Enw | /ˌadnaˈbəðjaɨ̯θ/ | knowledge (of a person or place), acquaintance, recognition, identification. |
| 99 | adnabyddwch | Berf | /adnaˈbəðʊχ/ | |
| 100 | adnewyddiad | Enw | /ˌadneu̯ˈəðjad/ | a renewal, a renovation, a rejuvenation. |
| 101 | adolygiadau | Enw | /ˌadɔləɡˈjadaɨ̯/ | |
| 102 | adolygiaeth | Enw | /ˌadɔˈləɡjaɨ̯θ/ | Equivalent to 'revisionism': The advocacy of a revision of some accepted theory, doctrine or a view of historical events… |
| 103 | adroddiadau | Enw | ||
| 104 | adweithegwyr | Enw | /ˌadwei̯ˈθɛɡwɨ̞r/ | |
| 105 | adweithegydd | Enw | /ˌadwei̯ˈθɛɡɨ̞ð/ | reflexologist. |
| 106 | aeddfedrwydd | Enw | /eɨ̯ðˈvɛdrʊɨ̯ð/ | |
| 107 | aelodaethau | Enw | /ˌeɨ̯lɔˈdeɨ̯θaɨ̯/ | |
| 108 | afal (y) llygad | Enw | ||
| 109 | afal bach sur | Enw | crabapple (wild species of Malus). | |
| 110 | afal y bwci | Enw | rosehips, the fruit of the rose plant (Rosa canina). | |
| 111 | afal y ddaear | Enw | ||
| 112 | afal y gar | Enw | ||
| 113 | afal y glyn | Enw | ||
| 114 | afal y grudd | Enw | ||
| 115 | afal y gwddf | Enw | ||
| 116 | afal y llygad | Enw | ||
| 117 | Affricanaidd | Enw, Ansoddair | Equivalent to 'African': A native of Africa; also one ethnologically belonging to an African race. | |
| 118 | aflonyddiad | Enw | /ˌavlɔˈnəðjad/ | disturbance, disruption. |
| 119 | aflonyddwch | Enw | /ˌavlɔˈnəðʊχ/ | disturbance, restlessness. |
| 120 | aflwyddiannus | Ansoddair | /ˌavlʊɨ̯ðˈjanɨ̞s/ | unsuccessful. |
| 121 | aflwyddiant | Enw | /avˈlʊɨ̯ðjant/ | failure, calamity. |
| 122 | aflywodraeth | Enw | /ˌavləˈwɔdraɨ̯θ/ | misrule, disorder, lawlessness. |
| 123 | aflywodraethu | Enw, Berf | /avləwɔˈdreɨ̯θɨ̞/ | to misrule, to misgovern. |
| 124 | afondeithiau | Enw | /ˌavɔnˈdei̯θjaɨ̯/ | |
| 125 | afradlonedd | Enw | /ˌavradˈlɔnɛð/ | prodigality, wastefulness, profligacy. |
| 126 | afradlonrwydd | Enw | ||
| 127 | afreolusrwydd | Enw | /avrɛ.ɔˈlɨ̞srʊɨ̯ð/ | disorderliness, disorder, unruliness. |
| 128 | afresymoldeb | Enw | /ˌavrɛsəmˈɔldɛb/ | unreasonableness. |
| 129 | afrwyddineb | Enw | ||
| 130 | afuad croen neidr | Enw | ||
| 131 | afuad gwelw Gwenffrewi | Enw | ||
| 132 | afuad mawr pêr | Enw | great scented liverwort, snakeskin liverwort (Conocephalum conicum). | |
| 133 | agerforthwyl | Enw | /ˌaɡɛrˈvɔrθuɨ̯l/ | Equivalent to 'steam hammer': An industrial machine designed to produce a hammer action through steam power. |
| 134 | agosatrwydd | Enw | /ˌaɡɔˈsatrʊɨ̯ð/ | |
| 135 | ail ar bymtheg | Ansoddair | /ˌai̯l ar ˈbəmθɛɡ/ | seventeenth. |
| 136 | ail ar hugain | Ansoddair | /ˌai̯l ar ˈhɪɡai̯n/ | twenty-second. |
| 137 | ailadeiladaf | Enw | ||
| 138 | ailadeiladu | Enw | /ai̯ladei̯ˈladɨ̞/ | to rebuild, to reconstruct. |
| 139 | ailarbymtheg | Ansoddair | alternative spelling of ail ar bymtheg (“seventeenth”). | |
| 140 | ailarbymtheg ar hugain | Ansoddair | /aɪlarˈbəmθɛɡ ar ˈhɪɡain/ | alternative spelling of ail ar bymtheg ar hugain (“thirty-seventh”). |
| 141 | ailddychmygu | Enw | ||
| 142 | aildrafftio | Enw | ||
| 143 | ailenedigaeth | Enw | /ˌai̯lɛnɛˈdɪɡaɨ̯θ/ | rebirth, regeneration. |
| 144 | ailfeddiannu | Enw, Berf | /ˌai̯lvɛˈðjanɨ̞/ | to repossess. |
| 145 | ailffurfiad | Enw | ||
| 146 | ailgyfeiria | Berf | /ai̯lɡəˈvei̯rja/ | |
| 147 | ailgyfeiriaf | Berf | /ai̯lɡəˈvei̯rjav/ | |
| 148 | ailgyfeirio | Berf | /ˌai̯lɡəˈvei̯rjɔ/ | to refer (someone to another person or to something). |
| 149 | ailgyflenwad | Enw | /ˌai̯lɡəvˈlɛn.wad/ | replenishment, resupply. |
| 150 | ailgyflenwi | Berf | /ˌai̯lɡəvˈlɛn.wi/ | to replenish, to restock. |
| 151 | ailgyflwyno | Berf | /ˌai̯lɡəvˈlʊɨ̯nɔ/ | to reintroduce. |
| 152 | ailgyfuniad | Enw | /ˌai̯lɡəˈvɨ̞njad/ | recombination. |
| 153 | ailgynefino | Enw, Berf | /ˌai̯lˌɡənɛvˈɪnɔ/ | to refamiliarize, to reaccustom, to rehabituate. |
| 154 | ailystyriaeth | Enw | /ai̯ləsˈdərjaɨ̯θ/ | reconsideration. |
| 155 | ailystyried | Enw, Berf | /ai̯ləsˈdərjɛd/ | to reconsider. |
| 156 | alan mis bach | Enw | winter heliotrope (Petasites pyrenaicus syn. Petasites fragrans). | |
| 157 | alarch y Gogledd | Enw | ||
| 158 | alcalinaidd | Enw | ||
| 159 | alcoholaidd | Enw, Ansoddair | /alkɔˈhɔlai̯ð/ | Equivalent to 'Alcoholic': A person who is addicted to alcohol. |
| 160 | alcoholiaeth | Enw | ||
| 161 | alcyleiddio hydrogen fflworid | Enw | ||
| 162 | allan o'r cyffredin | Enw | out of the ordinary, strange. | |
| 163 | allanadliad | Enw | ||
| 164 | allforiadwy | Enw, Ansoddair | /ˌaɬvɔrˈjadʊɨ̯/ | exportable. |
| 165 | allgofnodaf | Berf | ||
| 166 | alltudiaeth | Enw | /aɬˈtɨ̞djaɨ̯θ/ | exile, banishment, deportation. |
| 167 | allweddellau | Enw | /ˌaɬwɛˌðɛɬaɨ̯/ | |
| 168 | alyswm y mynydd | Enw | mountain alyssum, mountain alison (Alyssum montanum). | |
| 169 | alyswm y Pyreneau | Enw | Pyrenean alyssum, Pyrenean alison (Alyssum pyrenaicum). | |
| 170 | alyswm yr Alpau | Enw | Alpine alyssum, Alpine alison (Odontarrhena alpestris syn. Alyssum alpestre). | |
| 171 | am ben hynny | Enw | ||
| 172 | am wn i | Enw, Ymadrodd | /am ˌʊn ˈiː/ | as far as I know, for all I know. |
| 173 | am y tro | Enw, Ymadrodd | Equivalent to 'for the time being': Temporarily; for now; until later; until the situation changes; in an indefinite per… | |
| 174 | am yn ail | Enw | alternately. | |
| 175 | amaethyddol | Enw, Ansoddair | Equivalent to 'agricultural': A product or commodity from agriculture. | |
| 176 | amanita croen neidr | Enw | ||
| 177 | amason gwar cennog | Enw | ||
| 178 | ambiwlansiau | Enw | ||
| 179 | ambiwlansys | Enw | /ˈambɪu̯ˌlansɨ̞s/ | |
| 180 | amcangyfrif | Enw, Berf | /ˌamkaŋˈɡəvrɪv/ | estimate, estimation. |
| 181 | amcangyfrifon | Enw | /ˌamkaŋɡəvˈrɪvɔn/ | |
| 182 | amchwaraefa | Enw | Equivalent to 'Amphitheatre': An open, outdoor theatre (which may be a theatre in the round, or have a stage with seatin… | |
| 183 | amddiffynfa | Enw | Equivalent to 'Fort': A fortified defensive structure stationed with troops. | |
| 184 | amddiffynnaf | Berf | /amðɪˈfənav/ | |
| 185 | amddiffynnwr | Enw | defender, protector, bodyguard. | |
| 186 | Americanaidd | Enw, Ansoddair | Equivalent to 'American': A citizen or national of the United States of America. | |
| 187 | amffibiaidd | Ansoddair | Equivalent to 'Amphibian': An animal of the Amphibia; any vertebrate that does not have amniotic eggs, living both on la… | |
| 188 | amgueddfaol | Enw | ||
| 189 | amgyffrediad | Enw | ||
| 190 | amgylcheddau | Enw | ||
| 191 | amgylcheddol | Enw, Ansoddair | /ˌamɡəlˈχɛðɔl/ | environmental. |
| 192 | amgylcheddwr | Enw | ||
| 193 | amgylchedig | Enw, Ansoddair | /amɡəɬˈχɛdɪɡ/ | surrounded, encompassed. |
| 194 | amgylchiadau | Enw | ||
| 195 | amgylchiadol | Ansoddair | circumstantial. | |
| 196 | amgylchiedig | Ansoddair | /amɡəɬχˈjɛdɪɡ/ | (Ansoddair). |
| 197 | amgylchoedd | Enw | ||
| 198 | amgylchynol | Enw, Ansoddair | ambient, surrounding. | |
| 199 | amharodrwydd | Enw | reluctance, unwillingness. | |
| 200 | amhenderfynol | Enw, Ansoddair | /ˌamhɛndɛrˈvənɔl/ | undetermined, irresolute. |
| 201 | amherffaith | Enw, Ansoddair | /am̥ˈhɛrfai̯θ/ | imperfect. |
| 202 | amholiticaidd | Enw, Ansoddair | /amˌhɔlɪˈtɪkai̯ð/ | Equivalent to 'Apolitical': A person with no involvement or no interest in politics. |
| 203 | amhriodoldeb | Enw | impropriety, inappropriateness. | |
| 204 | amhrisiadwy | Ansoddair | /am̥r̥ɪsˈjadʊɨ̯/ | priceless, invaluable, inestimable. |
| 205 | amhroffidiol | Enw, Ansoddair | /am̥rɔˈfɪdjɔl/ | unprofitable, unbeneficial. |
| 206 | amhrofiadol | Enw, Ansoddair | /am̥rɔvˈja(ː)dɔl/ | untested, theoretical. |
| 207 | amhrydllwyd | Enw | alternative spelling of amrhydlwyd (“fleabane”). | |
| 208 | amlannirlawn | Enw, Ansoddair | /amlaˈnɪrlau̯n/ | polyunsaturated. |
| 209 | amldduwiaeth | Enw | /amlˈðɨ̞u̯jaɨ̯θ/ | Equivalent to 'Polytheism': The belief in the existence of multiple gods. |
| 210 | amlflodeuog | Ansoddair | many-flowered, multifloral, multiflorous. | |
| 211 | amlgarwriaeth | Enw | /aml̩ɡaˈrʊrjaɨ̯θ/ | polyamory (relationship with multiple partners with the consent of all involved). |
| 212 | amlinelliad | Enw | /amlɪˈnɛɬjad/ | outline, sketch, silhouette. |
| 213 | amlwreiciog | Enw | ||
| 214 | amrhydlwyd yr Ariannin | Enw | ||
| 215 | amryffurfedd | Enw | polymorphism, pleomorphism. | |
| 216 | amrywiaethau | Enw | /ˌamrɪu̯ˈjeɨ̯θaɨ̯/ | |
| 217 | amrywiasant | Berf | ||
| 218 | amrywiolion | Enw, Ansoddair | (Ansoddair). | |
| 219 | amser i ffwrdd | Enw | Equivalent to 'time off': A period of time where one is not required to work. | |
| 220 | amseriaduron | Enw | /ˌamsɛrjaˈdɨ̞rɔn/ | |
| 221 | anachroniaeth | Enw | /anaˈχrɔnjaɨ̯θ/ | anachronism. |
| 222 | anaddasrwydd | Enw | ||
| 223 | anadlu i mewn | Enw, Berf | to breathe in, to inhale. | |
| 224 | anadnabyddus | Enw, Ansoddair | /ˌanadnaˈbəðɨ̞s/ | |
| 225 | anarchiaeth | Enw | /aˈnarχjaɨ̯θ/ | Equivalent to 'anarchism': A political and philosophical belief that all forms of government are undesirable, unnecessar… |
| 226 | aneffeithiol | Enw, Ansoddair | /anɛˈfei̯θjɔl/ | ineffective, ineffectual. |
| 227 | anesboniadwy | Enw, Ansoddair | /ˌanɛsbɔnˈjadʊɨ̯/ | Equivalent to 'inexplicable': Something that is impossible to explain. |
| 228 | anesgusodol | Ansoddair | /ˌanɛsɡɨ̞ˈsɔdɔl/ | inexcusable. |
| 229 | anesmwythyd | Enw | ||
| 230 | anestynadwy | Enw, Ansoddair | inextensible. | |
| 231 | anewyllysgar | Enw | ||
| 232 | anfanteisiol | Enw, Ansoddair | /anvanˈtei̯ʃɔl/ | disadvantageous, detrimental, unfavourable. |
| 233 | anfanteision | Enw | /ˌanvanˈtei̯ʃɔn/ | |
| 234 | anfeddylgar | Enw, Ansoddair | /anvɛˈðəlɡar/ | unthinking, rash. |
| 235 | anfeidroldeb | Enw | ||
| 236 | anffaeledig | Enw, Ansoddair | /anfeɨ̯ˈlɛdɪɡ/ | infallible, inerrant. |
| 237 | anffrwythlon | Enw, Ansoddair | Equivalent to 'Sterile': Qui est exempt de micro-organismes viables ; obtenu ou maintenu par stérilisation (ou condition… | |
| 238 | anffurfiedig | Enw, Ansoddair | /anfɨ̞rvˈjɛdɪɡ/ | deformed, disfigured, defaced. |
| 239 | anffyddiaeth | Enw | /anˈfəðjaɨ̯θ/ | atheism, irreligion. |
| 240 | anffyddlondeb | Enw | unfaithfulness, infidelity. | |
| 241 | anfoddogrwydd | Enw | ||
| 242 | anfodlonrwydd | Enw | dissatisfaction, discontent. | |
| 243 | anfoesoldeb | Enw | ||
| 244 | anfonheddig | Enw | ||
| 245 | anfuddioldeb | Enw | ||
| 246 | anfynychder | Enw | ||
| 247 | angenrheidiol | Enw, Ansoddair | /ˌaŋɛnˈr̥ei̯djɔl/ | Equivalent to 'necessary': A place to do the "necessary" business of urination and defecation: an outhouse or lavatory. |
| 248 | anghaboledig | Enw | ||
| 249 | anghadernid | Enw | ||
| 250 | anghallineb | Enw | senselessness, insanity, stupidity. | |
| 251 | anghofiadwy | Enw, Ansoddair | /aŋhɔvˈjadʊɨ̯/ | forgettable, unmemorable (not worthy of remembering). |
| 252 | anghofiasant | Berf | ||
| 253 | anghofiasom | Berf | ||
| 254 | anghofiedig | Enw, Ansoddair | /aŋhɔvˈjɛdɪɡ/ | Equivalent to 'Forgotten': A person or thing that has been forgotten. |
| 255 | anghofrwydd | Enw | /aŋˈhɔvrʊɨ̯ð/ | Equivalent to 'Forgetfulness': The quality of being forgetful; proneness to let slip from the mind. |
| 256 | anghofuster | Enw | /ˌaŋhɔˈvɨ̞sdɛr/ | obliviscence. |
| 257 | anghredadwy | Enw, Ansoddair | /ˌaŋhrɛˈdadʊɨ̯/ | unbelievable, incredible. |
| 258 | anghredinaeth | Enw | ||
| 259 | anghrediniol | Enw | ||
| 260 | anghrefyddol | Enw | ||
| 261 | anghwrteisi | Enw | ||
| 262 | anghyd-weld | Enw, Berf | /ˌaŋhɨ̞dˈwɛld/ | to disagree. |
| 263 | anghydfodau | Enw | /ˌaŋhədˈvɔdaɨ̯/ | |
| 264 | anghydraddol | Enw | /ˌaŋhəˈdraðɔl/ | |
| 265 | anghydsynio | Enw, Berf | /ˌaŋhɨ̞dˈsənjɔ/ | to disagree, to differ. |
| 266 | anghyfaddas | Enw, Ansoddair | /ˌaŋhəˈvaðas/ | unsuitable, improper. |
| 267 | anghyfamserol | Enw | ||
| 268 | anghyfannedd | Enw, Ansoddair | lonely, solitary, forsaken, abandoned. | |
| 269 | anghyfartal | Enw, Ansoddair | /ˌaŋhəˈvartal/ | unequal, disproportionate. |
| 270 | anghyfarwydd | Enw | ||
| 271 | anghyfeillgar | Enw | ||
| 272 | anghyfforddus | Ansoddair | /ˌaŋhəˈfɔrðɨ̞s/ | causing discomfort. |
| 273 | anghyffredin | Enw, Ansoddair | /ˌaŋhəfˈrɛdɪn/ | extraordinary. |
| 274 | anghyfiawnder | Enw | /ˌaŋhəvˈjau̯ndɛr/ | injustice. |
| 275 | anghyflawnder | Enw | ||
| 276 | anghyfleuster | Enw | inconvenience. | |
| 277 | anghyfleustra | Enw | ||
| 278 | anghyflogaeth | Enw | /ˌaŋhəvˈlɔɡaɨ̯θ/ | Equivalent to 'unemployment': Interruption or alteration that the workers do of his activity to protest against the cond… |
| 279 | anghyfochrog | Ansoddair | unparalleled, nonparallel. | |
| 280 | anghyfraith | Enw | ||
| 281 | anghymedrol | Enw | ||
| 282 | anghymesuredd | Enw | ||
| 283 | anghymhwyso | Berf | /aŋhəmˈhʊɨ̯sɔ/ | to make unsuitable, to make unfit. |
| 284 | anghymhwyster | Enw | /aŋhəmˈhʊɨ̯stɛr/ | unsuitability, unfitness. |
| 285 | anghymreictod | Enw | ||
| 286 | anghymreigio | Enw, Berf | /ˌaŋhəmˈrei̯ɡjɔ/ | to make un-Welsh. |
| 287 | anghysegredig | Enw | ||
| 288 | anghyseinedd | Enw | /ˌaŋhəˈsei̯nɛð/ | Equivalent to 'Discord': An instant messaging and VoIP social platform which allows communication through voice calls, v… |
| 289 | anghysondeb | Enw | ||
| 290 | anghytgordiau | Enw | /ˌaŋhətˈɡɔrdjaɨ̯/ | |
| 291 | anghytundeb | Enw | /ˌaŋhəˈtɨ̞ndɛb/ | disagreement, difference, dissent. |
| 292 | anghytundebau | Enw | /ˌaŋhətɨ̞nˈdɛbaɨ̯/ | |
| 293 | anghywasgadwy | Enw | ||
| 294 | anhapusrwydd | Enw | Equivalent to 'Unhappiness': The feeling of not being happy. | |
| 295 | anhrwythedig | Enw, Ansoddair | /anr̥uɨ̯ˈθɛdɪɡ/ | unsaturated. |
| 296 | anhryloywder | Enw | /ˌanr̥əˈlɔɨ̯wdɛr/ | opacity, opaqueness. |
| 297 | anhunanoldeb | Enw | ||
| 298 | anhwylder personoliaeth gwrthgymdeithasol | Enw | antisocial personality disorder. | |
| 299 | anhwylderau | Enw | /ˌanhʊɨ̯lˈdɛraɨ̯/ | |
| 300 | anhwylustod | Enw | /anhʊɨ̯ˈlɨ̞sdɔd/ | inconvenience, inexpedience. |
| 301 | anifeilaidd | Enw, Ansoddair | animal, beastly, brutish, inhuman. | |
| 302 | anifeiliaid | Enw | ||
| 303 | animeiddiad | Enw | /ˌanɪˈmei̯ðjad/ | animation. |
| 304 | animeiddiadau | Enw | /ˌanɪˈmei̯ðjˈjadaɨ̯/ | |
| 305 | animeiddiedig | Enw | ||
| 306 | animeiddiwr | Enw | /ˌanɪˈmei̯ðjʊr/ | |
| 307 | animeiddwyr | Enw | /ˌanɪˈmei̯ðwɨ̞r/ | |
| 308 | animeiddydd | Enw | ||
| 309 | anlladrwydd | Enw | ||
| 310 | anllywodraeth | Enw | ||
| 311 | annarfodedig | Enw | ||
| 312 | anneheurwydd | Enw | ||
| 313 | annerbyniol | Ansoddair | /ˌanɛrˈbənjol/ | Equivalent to 'unacceptable': Something that is not acceptable. |
| 314 | annhebygrwydd | Enw | /ˌanhɛˈbəɡrʊɨ̯ð/ | dissimilarity, unlikeness, difference (quality or characteristic of being dissimilar). |
| 315 | annherfynol | Enw, Ansoddair | /ˌanhɛrˈvənɔl/ | Equivalent to 'Infinitive': The infinitive mood or mode (a grammatical mood). |
| 316 | annhoreithiog | Enw | ||
| 317 | annhymhoraidd | Enw | ||
| 318 | annibynadwy | Ansoddair | /ˌanɪbəˈnadʊɨ̯/ | unreliable, untrustworthy. |
| 319 | annibyniaeth | Enw | Equivalent to 'independence': The quality or state of being independent; lack of dependence; the state of not being reli… | |
| 320 | anniddigrwydd | Enw | ||
| 321 | annifyrrwch | Enw | ||
| 322 | annisgybledig | Enw | ||
| 323 | anniwylliedig | Enw | ||
| 324 | annoethineb | Enw | ||
| 325 | annymunoldeb | Enw | ||
| 326 | anobeithiau | Enw | /ˌanɔˈbei̯θjaɨ̯/ | |
| 327 | anobeithiol | Enw, Ansoddair | /ˌanɔˈbei̯θjɔl/ | Equivalent to 'hopeless': Without hope; despairing; not expecting anything positive. |
| 328 | anocheladwy | Enw | Equivalent to 'Unavoidable': Something that cannot be avoided. | |
| 329 | anorchfygol | Enw, Ansoddair | invincible, unconquerable. | |
| 330 | anrheithiad | Enw | ||
| 331 | anrhydeddau | Enw | ||
| 332 | anrhydeddus | Enw, Ansoddair | /ˌanhrəˈdɛðɨ̞s/ | honourable, respectable, worthy. |
| 333 | ansefydlogi | Enw, Berf | to destabilise, to unsettle. | |
| 334 | ansoddeiriau | Enw | /ˌansɔˈðei̯rjaɨ̯/ | |
| 335 | ansoddeiriol | Enw, Ansoddair | /anˌsɔðeːˈrjɔl/ | Equivalent to 'adjectival': An adjectival phrase or clause. |
| 336 | ansylweddol | Enw, Ansoddair | /ansəlˈwɛðɔl/ | insubstantial, immaterial. |
| 337 | ansymudadwy | Enw | ||
| 338 | anturiaethau | Enw | /antɪrˈjaiθaɨ/ | |
| 339 | anturiaethus | Enw | ||
| 340 | anufudd-dod | Enw | insubordination. | |
| 341 | anwadalfarn | Ansoddair | fickle, volatile, prone to changing one's mind. | |
| 342 | anweddusrwydd | Enw | ||
| 343 | anwedduster | Enw | ||
| 344 | anwleidyddol | Enw, Ansoddair | /ˌanwlei̯ˈdəðɔl/ | Equivalent to 'Apolitical': A person with no involvement or no interest in politics. |
| 345 | anwythyddion | Enw | ||
| 346 | anymostyngar | Enw | ||
| 347 | anystyriaeth | Enw | ||
| 348 | anystywallt | Enw, Ansoddair | /anəsˈdəu̯aɬd/ | turbulent, unruly, intractable, stubborn. |
| 349 | apostolaidd | Enw, Ansoddair | /apɔsˈdɔlai̯ð/ | apostolic. |
| 350 | apostoliaeth | Enw | ||
| 351 | ar ben bore | Enw | ||
| 352 | ar ben hynny | Enw | ||
| 353 | ar bigau drain | Enw | ||
| 354 | ar ddechrau'n deg | Enw | ||
| 355 | ar ei berygl | Enw | ||
| 356 | ar ei ddegfed | Enw | tenfold, repeated ten times. | |
| 357 | ar ei gyfer | Enw | rash, beside the mark. | |
| 358 | ar ei lafar | Adferf | at one's word. | |
| 359 | ar fy nhwca | Enw | /ˌar və ˈn̥ʊka/ | really, seriously, on my life. |
| 360 | ar y cam | Enw | /ˌar ə ˈkam/ | in the wrong, at fault. |
| 361 | ar y cychwyn | Enw | at first, prima facie. | |
| 362 | ar y cyntaf | Enw | at first, originally. | |
| 363 | ar y draen | Enw | ||
| 364 | ar y drain | Enw | ||
| 365 | ar y ffordd | Enw | /ˌar ə ˈfɔrð/ | on the way (while travelling). |
| 366 | ar y foment | Enw | ||
| 367 | ar y gwëyll | Enw | /ˌar ə ˈɡweː.ɨ̞ɬ/ | in progress, underway, on the stocks. |
| 368 | ar y naw | Enw | ||
| 369 | ar y tro | Enw | ||
| 370 | ar y trywydd | Enw | /ˌar ə ˈtrəu̯.ɨ̞ð/ | on the trail, in pursuit. |
| 371 | ar y wagen | Enw | Used other than figuratively or idiomatically: see ar, y, wagen. | |
| 372 | ar yn ail | Enw | alternately. | |
| 373 | aralleiddio | Enw | ||
| 374 | arallgyfeirio | Enw | ||
| 375 | arbelydredig | Enw | ||
| 376 | arbelydriad | Enw | ||
| 377 | arbenigwraig | Enw | Equivalent to 'scholar': A student; one who studies at school or college, typically having a scholarship. | |
| 378 | archangylion | Enw | /ˌarχaˈŋəljɔn/ | |
| 379 | archdderwydd | Enw | /arχˈðɛrwɨ̞ð/ | archdruid. |
| 380 | Archentaidd | Ansoddair | /arˈχɛntai̯ð/ | Argentinian, Argentine. |
| 381 | Archentwraig | Ansoddair | /arˈχɛntwrai̯ɡ/ | Argentinian, Argentine. |
| 382 | archesgobiaid | Enw | ||
| 383 | archesgobion | Enw | /ˌarχɛsˈɡɔbjɔn/ | |
| 384 | archfarchnad | Enw | /arχˈvarχnad/ | Equivalent to 'supermarket': A large self-service store that sells groceries and, usually, medications, household goods… |
| 385 | ardal isafswm ocsigen | Enw | ||
| 386 | arddangosfa | Enw | /ˌarðaŋˈɡɔsva/ | a display, an exhibition. |
| 387 | arddangosiad | Enw | ||
| 388 | arddangoswr | Enw | ||
| 389 | arddangosyn | Enw | ||
| 390 | arddansoddiad | Enw | /ˌarðanˈsɔðjad/ | ontology, metaphysics. |
| 391 | arddwriaeth | Enw | ||
| 392 | areithyddol | Enw | ||
| 393 | arf dinistr torfol | Enw | weapon of mass destruction. | |
| 394 | arf eang ddistryw | Enw | weapon of mass destruction. | |
| 395 | arfordiroedd | Enw | Equivalent to 'coast': The edge of the land where it meets an ocean, sea, gulf, bay, or large lake. | |
| 396 | argaenwaith | Enw | Equivalent to 'marquetry': A decorative technique in which veneers of wood, ivory, metal etc. | |
| 397 | arglwyddesau | Enw | /ˌarɡlʊɨ̯ˈðɛsaɨ̯/ | |
| 398 | arglwyddiaeth | Enw | /arˈɡlʊɨ̯ðjaɨ̯θ/ | dominion, authority. |
| 399 | argraffiadau | Enw | /ˌarɡrafˈjadaɨ̯/ | |
| 400 | argraffiadol | Enw, Ansoddair | /ˌarɡrafˈjadɔl/ | impressionistic, impressionist. |
| 401 | argraffiadwyr | Enw | /ˌarɡrafˈjadwɨ̞r/ | |
| 402 | argraffiadydd | Enw | /ˌarɡrafˈjadɨ̞ð/ | Equivalent to 'Impressionist': One who adheres to the theory or method of impressionism. |
| 403 | argraffyddion | Enw | /ˌarɡraˈfəðjɔn/ | |
| 404 | argrafiadau | Enw | /ˌarɡrafˈjadaɨ̯/ | |
| 405 | argyhoeddiad | Enw | /arɡəˈhɔɨ̯ðjad/ | conviction (strong belief), convincement. |
| 406 | arian dros ben | Enw | ||
| 407 | arian Gwion bach | Enw | marsh lousewort (Pedicularis palustris). | |
| 408 | arian y gwair | Enw | yellow rattle (Rhinanthus minor). | |
| 409 | arian y gweirwyr | Enw | yellow rattle (Rhinanthus minor). | |
| 410 | arian y meirch | Enw | yellow rattle (Rhinanthus minor). | |
| 411 | arianllys y mynydd | Enw | Alpine meadowrue (Thalictrum alpinum). | |
| 412 | arlywyddiaeth | Enw | ||
| 413 | arolygiadau | Enw | /ˌarɔləɡˈjadaɨ̯/ | |
| 414 | arolygiaeth | Enw | /ˌarɔˈləɡjaɨ̯θ/ | supervision, superintendency. |
| 415 | arolygiaethau | Enw | /ˌarɔləɡˈjeɨ̯θaɨ̯/ | |
| 416 | aromatherapi | Enw | /aˌrɔmaˈθɛrapi/ | Equivalent to 'aromatherapy': The use of selected fragrances in lotions and inhalants in an effort to affect mood and pr… |
| 417 | artiffisial | Ansoddair | artificial. | |
| 418 | arwahanedig | Enw | ||
| 419 | arwahanrwydd | Enw | ||
| 420 | arweiniadau | Enw | /ˌarwei̯nˈjadaɨ̯/ | |
| 421 | arweinyddion | Enw | /arwei̯ˈnəðjɔn/ | |
| 422 | arwerthiannau | Enw | /ˌarwɛrθˈjanaɨ̯/ | |
| 423 | arwerthiant | Enw | /arˈwɛrθjant/ | Equivalent to 'Auction': A public event where goods or property are sold to the highest bidder. |
| 424 | arwydd y sidydd | Enw | Equivalent to 'zodiac sign': Any of the twelve star signs corresponding to the constellations which make up the zodiac. | |
| 425 | arwynebeddau | Enw | /ˌarwɨ̞nɛˈbɛðaɨ̯/ | |
| 426 | asgetigiaeth | Enw | /ˌasɡɛˈtɪɡjaɨ̯θ/ | Equivalent to 'Asceticism': The principles and practices of an ascetic; extreme self-denial and austerity. |
| 427 | asid y stumog | Enw | Equivalent to 'gastric acid': The acidic secretion of the stomach; mostly hydrochloric acid. | |
| 428 | astigmatedd | Enw | /asdɪɡˈmatɛð/ | Equivalent to 'Astigmatism': A defect of a lens such that light rays coming from a point do not meet at a focal point so… |
| 429 | astudiaethau | Enw | /ˌasdɨ̞dˈjeɨ̯θaɨ̯/ | |
| 430 | at ei gilydd | Enw | /ˌat ei̯ ˈɡɪlɪð/ | all in all, for the most part, by and large. |
| 431 | at eich gilydd | Enw | /ˌat ei̯χ ˈɡɪlɪð/ | |
| 432 | at ein gilydd | Enw | /ˌat ei̯n ˈɡɪlɪð/ | |
| 433 | at y blewyn | Enw | to a hair, precisely, exactly. | |
| 434 | ataliad y galon | Enw | Equivalent to 'heart failure': The chronic inability of the heart to pump a sufficient amount of blood throughout the bo… | |
| 435 | atebolrwydd | Enw | accountability, responsibility, liability. | |
| 436 | atgenhedlaf | Berf | ||
| 437 | atgenhedlol | Enw | ||
| 438 | atgyfeiriad | Enw | ||
| 439 | atgyfeiriol | Enw | ||
| 440 | atgyflenwad | Enw | /ˌadɡəvˈlɛn.wad/ | replenishment, reinforcement. |
| 441 | atgyfnerthiad | Enw | reinforcement, strengthening, fortification. | |
| 442 | atgyfnerthol | Enw, Ansoddair | /atɡəvˈnɛrθɔl/ | strengthening, boosting, restorative. |
| 443 | atgyfnerthu | Enw, Berf | to reinforce, to strengthen. | |
| 444 | atgyweiriedig | Enw | ||
| 445 | atheistiaeth | Enw | ||
| 446 | athrawiaeth | Enw | Equivalent to 'doctrine': A belief or tenet, especially about philosophical or theological matters. | |
| 447 | atwrneiaeth | Enw | power of attorney (authorisation). | |
| 448 | awdurdodaeth | Enw | ||
| 449 | awdurdodaidd | Enw, Ansoddair | authoritarian. | |
| 450 | awdurdodydd | Enw | authoritarian. | |
| 451 | awdurdodyddol | Enw | ||
| 452 | awdurododol | Enw | ||
| 453 | aweddyfroedd | Enw | /ˌau̯.ɛˈðəvrɔɨ̯ð/ | |
| 454 | awgrymiadau | Enw | /ˌau̯ɡrəmˈjadaɨ̯/ | |
| 455 | awgrymiadol | Enw, Ansoddair | /ˌau̯ɡrəmˈjadɔl/ | Equivalent to 'Suggestive': Féminin singulier de suggestif. |
| 456 | awtistiaeth | Enw | /au̯ˈtɪsdjaɨ̯θ/ | |
| 457 | awyrgylchoedd | Enw | /ˌau̯.ərˈɡəlχɔɨ̯ð/ | |
| 458 | babieiddiwch | Enw | ||
| 459 | bachadain y derw | Enw | ||
| 460 | bachgennaidd | Enw | ||
| 461 | bachgennesau | Enw | ||
| 462 | bacio i fyny | Berf | to back up. | |
| 463 | bag am oes | Enw | Equivalent to 'bag for life': A reusable shopping bag, especially one that the retailer commits to replacing when it wea… | |
| 464 | bagloriaeth | Enw | Equivalent to 'Bachelor's degree': The first or lowest academic degree conferred by universities and colleges. | |
| 465 | Balcaneiddio | Enw, Berf | to Balkanise. | |
| 466 | Balcaneiddiol | Enw, Ansoddair | Balkanising. | |
| 467 | bangorwaith | Enw | Equivalent to 'Wattle': A construction of branches and twigs woven together to form a wall, barrier, fence, or roof. | |
| 468 | bant â ni | Enw, Ymadrodd | off we go. | |
| 469 | bant â'r cart | Enw, Ymadrodd | off we go. | |
| 470 | bar o siocled | Enw | bar of chocolate, chocolate bar. | |
| 471 | bara a chaws | Enw | bread-and-cheese, hawthorn leaves (as food). | |
| 472 | barbeciwiau | Enw | /barbɛˈkɪu̯jaɨ̯/ | |
| 473 | barbed amryliw America | Enw | ||
| 474 | barbed amryliw Asia | Enw | ||
| 475 | barbed gyddfddu Affrica | Enw | African black-necked barbet (Tricholaema melanocephala). | |
| 476 | barbed gyddfddu Asia | Enw | black-necked barbet (Psilopogon eximius syn. Megalaima eximia). | |
| 477 | barbed mantell wen | Enw | ||
| 478 | barbed pen rhesog | Enw | ||
| 479 | barbed talcen oren | Enw | ||
| 480 | barbed trwyn blewog | Enw | ||
| 481 | barddoniaeth | Enw | /barˈðɔnjaɨ̯θ/ | Equivalent to 'poetry': Literature composed in verse or language exhibiting conscious attention to patterns and rhythm. |
| 482 | barf hen ŵr | Enw | Equivalent to 'old man's beard': Chionanthus virginicus, a tree. | |
| 483 | barnwr y berth | Enw | ||
| 484 | barúg-wallt | Enw | obsolete spelling of barugwallt (“hair of hoarforst”). | |
| 485 | basgerfwedd | Enw | Equivalent to 'bas-relief': A low or mostly-flat sculpture which is carved into a wall, or is in the form of a tile moun… | |
| 486 | beic un olwyn | Enw | Equivalent to 'Unicycle': A pedal cycle that only has one wheel. | |
| 487 | beichiogrwydd | Enw | /bei̯χˈjɔɡrʊɨ̯ð/ | pregnancy. |
| 488 | beiddgarwch | Enw | Equivalent to 'Audacity': Insolent boldness, especially when imprudent or unconventional. | |
| 489 | beiriannwyr | Enw | /beɨ̯rˈjanwɨ̞r/ | soft mutation of peiriannwyr (“engineers”). |
| 490 | beiriannydd | Enw | /beɨ̯rˈjanɨ̞ð/ | soft mutation of peiriannydd. |
| 491 | beirniadaeth | Enw | /bei̯rnˈjadaɨ̯θ/ | criticism, disapproval. |
| 492 | benaethiaid | Enw | soft mutation of penaethiaid. | |
| 493 | bengwiniaid | Enw | /bɛŋˈɡwɪnjai̯d/ | soft mutation of pengwiniaid. |
| 494 | benthyciadau | Enw | ||
| 495 | berwi i lawr | Berf | to boil down to, to reduce to. | |
| 496 | berwr chwerw culddail | Enw | ||
| 497 | berwr melyn Awstria | Enw | ||
| 498 | berwr melyn croesryw | Enw | ||
| 499 | berwr melyn gogleddol | Enw | ||
| 500 | berwr melyn mawr | Enw | ||
| 501 | berwr melyn Tafwy | Enw | ||
| 502 | berwr melyn Walthamstow | Enw | ||
| 503 | berwr melyn ymlysgol | Enw | ||
| 504 | berwr y cerrig | Enw | tower rockcress (Turritis glabra). | |
| 505 | berwr y dŵr | Enw | watercress (Nasturtium officinale). | |
| 506 | berwr y fagwyr | Enw | mouse-ear cress, thale cress (Arabidopsis thaliana). | |
| 507 | berwr y ffynnon | Enw | watercress (Nasturtium officinale). | |
| 508 | berwr y gaeaf | Enw | wintercress, bittercress (Barbara vulgaris). | |
| 509 | berwren y dŵr | Enw | ||
| 510 | berwren y meysydd | Enw | ||
| 511 | beryliwm ethanoad basig | Enw | ||
| 512 | bihafio ei hun | Enw | ||
| 513 | bioamrywiaeth | Enw | /ˌbi.ɔamˈrɪu̯jaɨ̯ð/ | Equivalent to 'biodiversity': The diversity (number and variety of species) of plant and animal life within a region. |
| 514 | bioddiraddio | Enw, Berf | /ˌbi.oðɪˈraðjɔ/ | Equivalent to 'biodegrade': to decompose as a result of biological action, especially by microorganisms. |
| 515 | biwrocrataidd | Enw | ||
| 516 | blaen y tafod | Enw | ||
| 517 | blaen yr iwch | Enw | ||
| 518 | blaenafiaeth | Enw | ||
| 519 | blaenasgellwr | Enw | flanker, wing forward. | |
| 520 | blaenasgellwr ochr agored | Enw | openside flanker, openside wing forward. | |
| 521 | blaenasgellwr ochr dywyll | Enw | blindside flanker, blindside wing forward. | |
| 522 | blaenddodiad | Enw | /bleɨ̯nˈðɔdjad/ | |
| 523 | blaenfyddin | Enw | ||
| 524 | blaenhwylbren | Enw | ||
| 525 | blaenoriaeth | Enw | /bleɨ̯ˈnɔrjaɨ̯θ/ | priority, precedence. |
| 526 | blaenoriaid | Enw | /bleɨ̯ˈnɔrjai̯d/ | |
| 527 | blaidd y dŵr | Enw | Equivalent to 'Pike': A very long spear used two-handed by infantry soldiers for thrusting (not throwing), both for atta… | |
| 528 | blaidd y môr | Enw | ||
| 529 | blawd cnau coco | Enw | ||
| 530 | bleidd-dag y gaeaf | Enw | winter aconite (Eranthis hyemalis). | |
| 531 | bleidd-ddyn | Enw | Equivalent to 'Werewolf': A person who is transformed or can transform into a wolf or a wolflike human, often said to do… | |
| 532 | bleidleisio | Berf | /blei̯dˈlei̯ʃɔ/ | soft mutation of pleidleisio (“to vote”). |
| 533 | blentynnaidd | Ansoddair | /blɛnˈtənai̯ð/ | soft mutation of plentynnaidd. |
| 534 | blodau Santes Fair | Enw | ||
| 535 | blodfresych | Enw | /blɔdˈvrɛsɨ̞χ/ | cauliflowers (Brassica oleracea var. botrytis). |
| 536 | blodfresychen | Enw | /ˌblɔdvrɛˈsəχɛn/ | singulative of blodfresych (“cauliflowers”). |
| 537 | blodyn llo bach | Enw | buttercup (Ranunculus), especially meadow buttercup (Ranunculus acris). | |
| 538 | blodyn llo mawr | Enw | oxeye daisy (Leucanthemum vulgare). | |
| 539 | blodyn pi-pi'n gwely | Enw | dandelion (Taraxacum officinale). | |
| 540 | blodyn piso'n gwely | Enw | dandelion (Taraxacum officinale). | |
| 541 | blodyn y gog | Enw | ||
| 542 | blodyn y gwcw | Enw | ||
| 543 | blodyn y gwynt | Enw | especially wood anemone, windflower (Anemone nemorosa). | |
| 544 | blodyn y meirch | Enw | red campion (Silene dioica). | |
| 545 | blodyn y wig | Enw | ||
| 546 | blodyn yr eira | Enw | /ˌblɔdɨ̞n ər ˈei̯ra/ | Equivalent to 'Snowdrop': Any of the 20 species of the genus Galanthus of the Amaryllidaceae, bulbous flowering plants… |
| 547 | blodyn yr eryr | Enw | ||
| 548 | blodyn yr haul | Enw | ||
| 549 | blodyn yr sipsi | Enw | ||
| 550 | blodyn-Mihangel dail danadl | Enw | ||
| 551 | blodyn-y-gwynt y Balcanau | Enw | Balkan anemone (Anemone blanda). | |
| 552 | bloneg y ddaear | Enw | white bryony (Bryonia cretica subsp. dioica, syn. Bryonia dioica). | |
| 553 | blwyddiadur | Enw | Equivalent to 'annual': An annual publication; a book, periodical, journal, report, comic book, yearbook, etc., which is… | |
| 554 | blwyddiaduron | Enw | ||
| 555 | Blwyddyn Newydd Dda | Enw, Ymadrodd | /ˈblʊiðɪn ˈnɛ.wɪð ðaː/ | Equivalent to 'happy New Year': A wish said around the start of a new year to wish someone well for the New Year (holida… |
| 556 | blynyddoedd | Enw | /bləˈnəðɔɨ̯ð/ | |
| 557 | bob yn ail | Enw | alternate, alternating. | |
| 558 | bob yn dipyn | Enw | bit by bit, gradually. | |
| 559 | bob yn gam | Enw | step by step. | |
| 560 | bob yn ronyn | Enw | bit by bit, gradually. | |
| 561 | bob yn un | Enw | ||
| 562 | bod rhaid i | Enw | ||
| 563 | bod yn dawel | Enw | ||
| 564 | bodlediadau | Enw | soft mutation of podlediadau. | |
| 565 | bodlonrwydd | Enw | contentment, satisfaction. | |
| 566 | bonclustiad | Enw | /bɔŋˈklɨ̞sdjad/ | cuff on the ear, slap on the side of the head as corporal punishment. |
| 567 | bondigrybwyll | Ansoddair | /ˌbɔndɪɡˈrəbʊɨ̯ɬ/ | hardly mentionable, not worth mentioning. |
| 568 | boneddigaidd | Enw, Ansoddair | gracious, courteous, polite. | |
| 569 | boneddigesau | Enw | /ˌbɔnɛðɪˈɡɛsaɨ̯/ | |
| 570 | boneddigion | Enw | /ˌbɔnɛˈðɪɡjɔn/ | |
| 571 | boneddigion a boneddigesau | Enw | ladies and gentlemen. | |
| 572 | boneddigrwydd | Enw | ||
| 573 | bonet odre binc | Enw | ||
| 574 | boron nitrid ciwbig | Enw | ||
| 575 | boron nitrid hecsagonol | Enw | ||
| 576 | botwm derw Twrci | Enw | ||
| 577 | bradfwriadu | Enw | ||
| 578 | bradwriaeth | Enw | Equivalent to 'treason': The crime of betraying one’s own country. | |
| 579 | brân lwyd Papwa | Enw | grey crow, bare-faced crow (Corvus tristis). | |
| 580 | brân y cnau | Enw | ||
| 581 | bras melyn Japan | Enw | Japanese yellowhammer (Emberiza sulphurata). | |
| 582 | bras y cyrs | Enw | reed bunting (Emberiza schoeniclus). | |
| 583 | bras yr ŷd | Enw | corn bunting (Emberiza calandra). | |
| 584 | brawd yng nghyfraith | Enw | /ˌbrau̯d əŋ ˈŋ̊əvrai̯θ/ | Equivalent to 'brother-in-law': A male relative of one's generation, separated by one degree of marriage:. |
| 585 | brawdoliaeth | Enw | brotherhood, fraternity. | |
| 586 | brawychiadau | Enw | /ˌbrau̯əχˈjadaɨ̯/ | |
| 587 | brawychiaeth | Enw | /brau̯ˈəχjaɨ̯θ/ | Equivalent to 'terrorism': The system of fear and intimidation put into place during the Reign of Terror in Revolutionar… |
| 588 | brech y mwnci | Enw | Equivalent to 'mpox': A viral disease, of primates and some other mammals, related to smallpox, caused by Orthopoxvirus… | |
| 589 | brech yr ieir | Enw | chicken pox. | |
| 590 | brehyriaeth | Enw | ||
| 591 | breicheidio | Enw | ||
| 592 | breichwellt | Enw | ||
| 593 | breiniasant | Berf | ||
| 594 | breinryddid | Enw | Equivalent to 'Immunity': The state of being insusceptible to something; notably:. | |
| 595 | breinryddid y Goron | Enw | ||
| 596 | brenhinbysg | Enw | Equivalent to 'common ling': A fish of the species Molva molva, of eastern Atlantic waters, especially the North Sea. | |
| 597 | brenhiniaeth | Enw | Equivalent to 'Royalty': The rank, status, power or authority of a monarch. | |
| 598 | brenhinllys | Enw | Equivalent to 'Basil': A male given name from Ancient Greek, in quiet but steady use in the UK. | |
| 599 | brenhinoedd | Enw | /brɛnˈhɪnɔɨ̯ð/ | Equivalent to 'Kings': One of the various books called Kings in the Old Testament of Bible, and of the Tanakh. |
| 600 | breniniaethau | Enw | ||
| 601 | breninolion | Ansoddair | (Ansoddair). | |
| 602 | bresych y cŵn | Enw | dog's mercury (Mercurialis perennis). | |
| 603 | bresychaidd | Enw, Ansoddair | ||
| 604 | breuddwydio | Enw, Berf | /breɨ̯ˈðʊɨ̯djɔ/ | Equivalent to 'dream': Acronym of development, relief, and education for alien minors. |
| 605 | breuddwydion | Enw | /breɨ̯ˈðʊɨ̯djɔn/ | |
| 606 | breuwydd y graig | Enw | Frangula rupestris. | |
| 607 | briallen y cŵn | Enw | ||
| 608 | briallu Mair di-sawr | Enw | ||
| 609 | briallu Mair sawrus | Enw | ||
| 610 | briallu tal ffug | Enw | false oxlips (Primula × polyantha). | |
| 611 | briallu'r hwyr peraroglus | Enw | ||
| 612 | brifathrawes | Enw | soft mutation of prifathrawes (“headmistress”). | |
| 613 | brifathrawon | Enw | soft mutation of prifathrawon (“headmasters”). | |
| 614 | brig y nos | Enw | /ˌbriːɡ ə ˈnoːs/ | Equivalent to 'Gloaming': Twilight, as at early morning (dawn) or (especially) early evening; dusk. |
| 615 | brith yr oged | Enw | ||
| 616 | briweg dail gwlydd | Enw | ||
| 617 | briweg fach Mecsico | Enw | ||
| 618 | briweg fawr Mecsico | Enw | ||
| 619 | briweg y cariadon | Enw | ||
| 620 | briweg y Cawcasws | Enw | ||
| 621 | briweg y cerrig | Enw | ||
| 622 | briweg y graig | Enw | ||
| 623 | briweg y mynydd | Enw | ||
| 624 | briwsionllyd | Enw | ||
| 625 | briwydd y cerrig | Enw | ||
| 626 | briwydd y mur | Enw | wall bedstraw (Galium parisiense). | |
| 627 | brodoriaeth | Enw | brotherhood, fraternity. | |
| 628 | broffesiynol | Ansoddair | soft mutation of proffesiynol. | |
| 629 | bronleision | Enw | /brɔnˈlei̯ʃɔn/ | |
| 630 | bronrhuddyn | Enw | /brɔnˈr̥ɨ̞ðɨ̞n/ | robin, redbreast (Erithacus rubecula). |
| 631 | bronrhuddyn y mynydd | Enw | /brɔnˌr̥ɨ̞ðɨ̞n ə ˈmənɨ̞ð/ | brambling (Fringilla montifringilla). |
| 632 | bronwen y dŵr | Enw | white-throated dipper, dipper, water ouzel (Cinclus cinclus). | |
| 633 | bronwen y garw | Enw | ||
| 634 | bronwerth y wiber | Enw | viper's bugloss (Echium vulgare). | |
| 635 | brown y mynydd | Enw | linnet (Linaria cannabina syn. Carduelis cannabina). | |
| 636 | brwdfrydedd | Enw | /brʊdˈvrədɛð/ | enthusiasm, zeal. |
| 637 | brwydr yr iaith | Enw | ||
| 638 | brwysgedlys | Enw | ||
| 639 | brych bach Papwa | Enw | lesser ground robin, lesser New Guinea thrush (Amalocichla incerta). | |
| 640 | brych daear cefngoch | Enw | ||
| 641 | brych mawr Papwa | Enw | greater ground robin, greater New Guinea thrush (Amalocichla sclateriana). | |
| 642 | brych morgrug wynebddu | Enw | ||
| 643 | brych unig wynebddu | Enw | ||
| 644 | brych y cae | Enw | ||
| 645 | brych-breblyn bron gennog | Enw | ||
| 646 | bu(ch)frechu | Enw | ||
| 647 | buchfrechiad | Enw | /bɨχˈvrɛχjad/ | immunisation against cowpox. |
| 648 | buchfrechwr | Enw | /bɨχˈvrɛχur/ | advocate of vaccination against cowpox. |
| 649 | buchfrechydd | Enw | /bɨχˈvrɛχɨ̞ð/ | synonym of buchfrechwr (“administrator or advocate of cowpox vaccinations”). |
| 650 | buchod coch cwta | Enw | Equivalent to 'Ladybird': Any of the Coccinellidae family of beetles, typically having a round shape and red or yellow s… | |
| 651 | budd-ddeiliad | Enw | /ˌbɨːðˈðei̯ljad/ | Equivalent to 'stakeholder': A person holding the stakes of bettors, with the responsibility of delivering the pot to th… |
| 652 | buddsoddiad | Enw | ||
| 653 | buddugoliaeth | Enw | /bɨ̞ðɨ̞ˈɡɔljaɨ̯θ/ | jubilation, exultation. |
| 654 | bulwg yr ŷd | Enw | common corncockle (Agrostemma githago). | |
| 655 | burgynnaidd | Enw | ||
| 656 | buwch goch gota | Enw | ladybug, ladybird, ladycow. | |
| 657 | bwlbwl dail gyddf-felyn | Enw | yellow-gorgeted greenbul or yellow-throated leaflove (Atimastillas flavicollis syn. Chlorocichla flavicollis). | |
| 658 | bwlbwl y dail | Enw | leaflove (Phyllastrephus scandens). | |
| 659 | bwm y gors | Enw | /ˌbʊm ə ˈɡɔrs/ | any bittern (bird of the subfamily Botaurinae in the heron family, Ardeidae). |
| 660 | bwngleraidd | Enw | ||
| 661 | bwrdeisiaeth | Enw | ||
| 662 | bwrdeistref | Enw | Equivalent to 'Borough': The area, properly called Southwark, just south of London Bridge, which is at the north end of… | |
| 663 | bwrdeistrefol | Ansoddair | relating to a borough, municipal. | |
| 664 | bwrw ei lasog | Enw | ||
| 665 | bwrw i fyny | Berf | to throw up, to vomit. | |
| 666 | bwrw i lawr | Enw, Berf | to bring low, to put down. | |
| 667 | bwtsias y gog | Enw | ||
| 668 | bwyd dros ben | Enw | ||
| 669 | bwyd y gwcw | Enw | ||
| 670 | bwyd y gwyddau | Enw | ||
| 671 | bwystfilaidd | Enw, Ansoddair | beastly, brutish, savage, wild. | |
| 672 | byddin y tir | Enw | ||
| 673 | byddwch yn dawel | Ymadrodd | ||
| 674 | bylb terfyn synaptig | Enw | ||
| 675 | byr ei olwg | Ansoddair | /ˌbɨ̞r ei̯ ˈɔlʊɡ/ | short-sighted, near-sighted, myopic. |
| 676 | byrbwylltra | Enw | ||
| 677 | bys y cogwrn | Enw | middle finger. | |
| 678 | bys y din | Enw | middle finger. | |
| 679 | bys y fodrwy | Enw | Equivalent to 'ring finger': The finger between the middle finger and the little finger; the "third finger" (UK) or the… | |
| 680 | bys yr uwd | Enw | index finger, forefinger. | |
| 681 | bysedd y blaidd | Enw | ||
| 682 | bysedd y cŵn | Enw | foxgloves (plant of the genus Digitalis). | |
| 683 | bysellfwrdd | Enw | /bəˈsɛɬvʊrð/ | Equivalent to 'keyboard': A set of keys laid out in a grid-like pattern, used for typing on a typewriter, computer etc. |
| 684 | byth a beunydd | Enw | ||
| 685 | bythgofiadwy | Enw | ||
| 686 | bywgraffiadol | Enw | ||
| 687 | bywgraffiadur | Enw | /bɪu̯ɡrafˈjadɨ̞r/ | biographical dictionary. |
| 688 | bywgraffyddol | Enw | ||
| 689 | bywiogrwydd | Enw | /bɨ̞u̯ˈjɔɡrʊɨ̯ð/ | liveliness, vivacity. |
| 690 | cachaduriaid | Enw | ||
| 691 | cadach o ddyn | Enw | ||
| 692 | cadeiryddion | Enw | ||
| 693 | cadw mewn cof | Enw | ||
| 694 | cael a chael | Berf, Adferf | to have a close shave, to barely achieve. | |
| 695 | cael gwared ar | Enw | ||
| 696 | cael llond bol | Enw, Berf | Equivalent to 'fed up': simple past and past participle of feed up. | |
| 697 | cael y masgl | Enw | ||
| 698 | caeth i'r tŷ | Enw | ||
| 699 | caethgludiad | Enw | deportation. | |
| 700 | caethwasiaeth | Enw | /keɨ̯θˈwaʃaɨ̯θ/ | |
| 701 | caethweision | Enw | /keɨ̯θˈwei̯ʃɔn/ | |
| 702 | caffaeledig | Ansoddair | /kafeɨ̯ˈlɛdɪɡ/ | acquired, gotten. |
| 703 | caineirian yr ednogyn | Enw | ||
| 704 | caldrist y banadl | Enw | broomrape (Orobanche crenata). | |
| 705 | caldrist y gors | Enw | marsh helleborine (Epipactis palustris). | |
| 706 | caldrist y twyni | Enw | dune helleborine (Epipactis dunensis). | |
| 707 | calendraidd | Enw | ||
| 708 | califforniwm | Enw | /ˌkalɪˈfɔrnjʊm/ | Equivalent to 'Californium': A strongly radioactive and highly fissile transuranic chemical element (symbol Cf) with an… |
| 709 | callod y derw | Enw | ||
| 710 | calon-dyner | Enw | ||
| 711 | calwain cala'r gethlydd | Enw | ||
| 712 | cam a cham | Enw | step by step. | |
| 713 | camamseriad | Enw | /kamamˈsɛrjad/ | mistiming, poor timekeeping. |
| 714 | cambig prysgdir coch | Enw | recurve-billed bushbird (Clytoctantes alixii). | |
| 715 | cambig prysgdir du | Enw | black bushbird (Neoctantes niger). | |
| 716 | cambig prysgdir Rondonia | Enw | Rondonia bushbird (Clytoctantes atrogularis). | |
| 717 | Cambodiaidd | Enw, Ansoddair | /kamˈbɔdjai̯ð/ | Equivalent to 'Cambodian': a person from Cambodia or of Cambodian descent. |
| 718 | camdreiglad | Enw | /(ˌ)kamˈdrei̯ɡlad/ | an incorrect mutation. |
| 719 | camdriniaeth | Enw | abuse, mistreatment. | |
| 720 | camesgoriad | Enw | /ˌkamɛsˈɡɔrjad/ | Equivalent to 'miscarriage': A failure; a mistake or error. |
| 721 | camfanteisio | Berf | to exploit, to abuse, to take advantage. | |
| 722 | camgyfarwyddo | Enw, Berf | /kamˌɡəvarˈwɨðɔ/ | to misdirect, to misguide. |
| 723 | camgymeriad | Enw | /kam.ɡə.ˈmɛr.jad/ | mistake, oversight, error. |
| 724 | camlywodraeth | Enw | /ˌkamləˈwɔdraɨ̯θ/ | misrule, misgovernance. |
| 725 | campweithiau | Enw | ||
| 726 | camreolaeth | Enw | /ˌkamrɛˈɔlaɨ̯θ/ | misgovernance, management, misrule. |
| 727 | camsillafiad | Enw | misspelling. | |
| 728 | camweinyddu | Enw, Berf | /kamwei̯ˈnəðɨ̞/ | to maladminister, to misadminister. |
| 729 | camystumiedig | Enw | ||
| 730 | canfed namyn un | Enw, Ansoddair | ninety-ninth. | |
| 731 | canfodyddion | Enw | /kanvɔˈdəðjɔn/ | |
| 732 | canfyddadwy | Ansoddair | /ˌkanvəˈðadʊɨ̯/ | perceptible, observable. |
| 733 | canhwyllbren | Enw | /kanˈhʊɨ̯ɬbrɛn/ | Equivalent to 'Candlestick': A holder with a socket or spike for a candle. |
| 734 | canlyniadau | Enw | /ˌkanlənˈjadaɨ̯/ | Equivalent to 'Corollary': A gift beyond what is actually due; an addition or superfluity. |
| 735 | canmoliaeth | Enw | /kanˈmɔljaɨ̯θ/ | Equivalent to 'Compliment': An expression of praise, congratulation, or respect. |
| 736 | canmoliaethau | Enw | /ˌkanmɔlˈjeɨ̯θaɨ̯/ | |
| 737 | canmoliaethus | Enw | ||
| 738 | cannoedd ar filoedd | Enw | hundreds of thousands. | |
| 739 | canol-glicio | Enw, Berf | /ˌkanɔlˈɡlɪkjɔ/ | to middle-click. |
| 740 | canolbarthau | Enw | /ˌkanɔlˈbarθaɨ̯/ | |
| 741 | canolbwyntiau | Enw | ||
| 742 | canolbwyntio | Enw, Berf | to focus, concentrate. | |
| 743 | canoldaflodol | Enw | ||
| 744 | canran cynnwys carbon | Enw | ||
| 745 | cant a hanner | Enw | ||
| 746 | cant ac ugain | Enw, Ansoddair | a hundred and twenty. | |
| 747 | cant dau ddeg | Enw, Ansoddair | one hundred and twenty. | |
| 748 | cant namyn un | Enw, Ansoddair | /ˌkant ˌnamɨ̞n ˈɨːn/ | Equivalent to 'ninety-nine': A traditional British ice cream cone with a flaky chocolate bar inserted, usually made with… |
| 749 | cantor yr Alpau | Enw | ||
| 750 | canwraidd y dom | Enw | ||
| 751 | canwraidd y dŵr | Enw | /ˌkanwrai̯ð ə ˈduːr/ | amphibious bistort (Persicaria maculosa). |
| 752 | canwraidd y mynydd | Enw | ||
| 753 | cap cennog blewog | Enw | ||
| 754 | cap cennog dreiniog | Enw | ||
| 755 | cap cennog euraidd | Enw | ||
| 756 | cap cennog gludiog | Enw | ||
| 757 | cap cennog melynaidd | Enw | ||
| 758 | cap cennog tanbaid | Enw | ||
| 759 | cap cwyr pinc | Enw | ||
| 760 | cap cwyr ymenyn | Enw | ||
| 761 | cap ffibr cennog | Enw | ||
| 762 | cap ffibr toredig | Enw | torn fibrecap (Inocybe lacera). | |
| 763 | cap gweog cennog | Enw | ||
| 764 | cap llaeth cyrri | Enw | ||
| 765 | cap nos mamgu | Enw | granny's bonnet, columbine (Aquilegia vulgaris). | |
| 766 | cap nos nain | Enw | ||
| 767 | carbocsylig | Ansoddair | carboxylic. | |
| 768 | carcharbwll | Enw | ||
| 769 | cardinaliaid | Enw | /ˌkardɪˈnaljai̯d/ | |
| 770 | caredigrwydd | Enw | /karɛˈdɪɡrʊɨ̯ð/ | Equivalent to 'Kindness': An instance of kind or charitable behaviour. |
| 771 | cario i ben | Enw, Berf | to carry out, to enact. | |
| 772 | carn y fedwen | Enw | hoof fungus (Fomes fomentarius). | |
| 773 | carn yr ebol | Enw | coltsfoot (Tussilago farfara). | |
| 774 | carn-yr-ebol y gerddi | Enw | asarabacca, wild ginger (Asarum europaeum). | |
| 775 | carn-yr-ebol y môr | Enw | sea bindweed (Calystegia soldanella). | |
| 776 | carnedd felen wryw | Enw | ||
| 777 | carreg ben mur | Enw | ||
| 778 | cartrefoldeb | Enw | ||
| 779 | carwas yr ŷd | Enw | corn parsley (Petroselinum segetum). | |
| 780 | carwriaethol | Ansoddair | /karʊrˈjeɨ̯θɔl/ | amatory, relating to courtship. |
| 781 | cas gan bladurwr | Enw | European matgrass (Nardus stricta). | |
| 782 | cas gan fuwch | Enw | cowbane, water hemlock (Cicuta virosa). | |
| 783 | cas gan fwnci | Enw | monkey-puzzle (Araucaria araucana). | |
| 784 | cas gan longwr | Enw | ||
| 785 | casiau gan fwnci | Enw | ||
| 786 | cast am gast | Enw | tit for tat, measure for measure. | |
| 787 | castanwydden | Enw | /ˌkasdanˈwɨ̞ðɛn/ | singulative of castanwydd. |
| 788 | catalogaidd | Enw | ||
| 789 | catamaranau | Enw | ||
| 790 | categoreiddio | Enw | ||
| 791 | cathan y gwernos | Enw | alder kitten moth (Furcula bicuspis). | |
| 792 | cau i fyny | Ymadrodd | shut up, an expression used when telling someone to be quiet. | |
| 793 | cawod goch amrain | Enw | ||
| 794 | cawod goch cegid | Enw | cowbane rust (Puccinia cicutae). | |
| 795 | cawod goch codoglys | Enw | ||
| 796 | cawod goch corlaethlys | Enw | ||
| 797 | cawod goch crwynllys | Enw | ||
| 798 | cawod goch danadl | Enw | ||
| 799 | cawod goch erwaint | Enw | ||
| 800 | cawod goch gliniogai | Enw | ||
| 801 | cawod goch gweunwellt | Enw | ||
| 802 | cawod goch llaethlys-cypreswydd | Enw | ||
| 803 | cawod goch llaethysgall | Enw | ||
| 804 | cawod goch llafrwyn | Enw | ||
| 805 | cawod goch llemfrwyn | Enw | ||
| 806 | cawod goch lloerforonen | Enw | ||
| 807 | cawod goch llwylys | Enw | ||
| 808 | cawod goch melog | Enw | lousewort rust (Puccinia clintonii). | |
| 809 | cawod goch merllys | Enw | ||
| 810 | cawod goch rhufon | Enw | ||
| 811 | cawod goch saffrwm | Enw | ||
| 812 | cawod goch teim | Enw | ||
| 813 | cawod goch tormaen | Enw | saxifrage rust (Melampsora vernalis). | |
| 814 | cedrwydd yr Atlas | Enw | Atlas cedars (Cedrus atlantica). | |
| 815 | cefnogaethau | Enw | ||
| 816 | ceg y groth | Enw | ||
| 817 | cegid dail persli | Enw | parsley water-dropwort (Oenanthe lachenalii). | |
| 818 | cegid y dŵr | Enw | hemlock water-dropwort (Oenanthe crocata). | |
| 819 | cegid yr afon | Enw | river water-dropwort (Oenanthe fluviatilis). | |
| 820 | ceidwadaeth | Enw | Equivalent to 'Conservatism': A political philosophy that advocates traditional values. | |
| 821 | ceiliog gwaun gopog | Enw | ||
| 822 | ceiliog y gwair | Enw | grasshopper (Orthoptera). | |
| 823 | ceirchwellt | Enw | ||
| 824 | ceirios y cwyros | Enw | ||
| 825 | ceirios y ddaear | Enw | ||
| 826 | ceirios y gaeaf | Enw | ||
| 827 | ceirios y sur | Enw | ||
| 828 | ceirios y tywod | Enw | ||
| 829 | ceirios y waun | Enw | ||
| 830 | ceirios yr adar | Enw | ||
| 831 | ceirioswydd | Enw | ||
| 832 | celfyddydau | Enw | arts, humanities. | |
| 833 | celfyddydol | Enw | ||
| 834 | celfyddydwr | Enw | ||
| 835 | cellweiriau | Enw | ||
| 836 | cen y cerrig | Enw | /ˌkɛn ə ˈkɛrɪɡ/ | stonecrop (Sedum spp.). |
| 837 | cen y coed | Enw | /ˌkɛn ə ˈkoːɨ̯d/ | |
| 838 | cenadeiniog | Ansoddair | /kɛnaˈdei̯njɔɡ/ | lepidopteran. |
| 839 | cenedlaethau | Enw | /ˌkɛnɛdˈleɨ̯θaɨ̯/ | |
| 840 | cenedlaetho | Enw | ||
| 841 | cenedlaethol | Ansoddair | /ˌkɛnɛdˈleɨ̯θɔl/ | Equivalent to 'national': A member of the National Party. |
| 842 | cenfigennus | Ansoddair | Equivalent to 'jealous': Suspecting rivalry in love; troubled by worries that one might have been replaced in someone's… | |
| 843 | cenhedlaeth | Enw | /kɛnˈhɛdlaɨ̯θ/ | Equivalent to 'age': The amount of time that some being has been alive, or that some thing has been in existence, as mea… |
| 844 | cenhedloedd | Enw | ||
| 845 | cenllys y muriau | Enw | ||
| 846 | cennin y gwinwydd | Enw | ||
| 847 | cerdded ar ôl | Berf | to go after, to follow. | |
| 848 | cerddolegol | Enw | ||
| 849 | cerddolegwr | Enw | ||
| 850 | cerddorfaol | Enw, Ansoddair | /ˌkɛrðɔrˈvaː.ɔl/ | orchestral. |
| 851 | cerddorfeydd | Enw | /ˌkɛrðɔrˈveɨ̯ð/ | |
| 852 | cerddoriaeth | Enw | /kɛrˈðɔrjaɨ̯θ/ | Equivalent to 'music': A series of sounds organized in time, usually employing some combination of harmony, melody, rhyt… |
| 853 | cerfluniaeth | Enw | sculpture (discipline). | |
| 854 | cesail y forddwyd | Enw | ||
| 855 | cethlydd y gwrych | Enw | ||
| 856 | ceuled a maidd | Enw | curds and whey. | |
| 857 | chalenigion | Enw | /χalɛˈnɪɡjɔn/ | aspirate mutation of calenigion. |
| 858 | Chambodiaidd | Ansoddair | /χamˈbɔdjai̯ð/ | aspirate mutation of Cambodiaidd. |
| 859 | chamdreiglo | Berf | /χamˈdrei̯ɡlɔ/ | aspirate mutation of camdreiglo. |
| 860 | chanfyddadwy | Ansoddair | /ˌχanvəˈðadʊɨ̯/ | aspirate mutation of canfyddadwy. |
| 861 | chanlyniadau | Enw | /ˌχanlənˈjadaɨ̯/ | aspirate mutation of canlyniadau. |
| 862 | chanolbarth | Enw | /χaˈnɔlbarθ/ | aspirate mutation of canolbarth. |
| 863 | chanolbarthau | Enw | /ˌχanɔlˈbarθaɨ̯/ | aspirate mutation of canolbarthau. |
| 864 | chardinaliaid | Enw | /ˌχardɪˈnaljai̯d/ | aspirate mutation of cardinaliaid. |
| 865 | chatamaranau | Enw | aspirate mutation of catamaranau. | |
| 866 | chatamaráns | Enw | aspirate mutation of catamaráns. | |
| 867 | cherddoriaeth | Enw | /χɛrˈðɔrjaɨ̯θ/ | aspirate mutation of cerddoriaeth (“music”). |
| 868 | chilogramau | Enw | aspirate mutation of cilogramau. | |
| 869 | chiwdodoedd | Enw | aspirate mutation of ciwdodoedd. | |
| 870 | chliniaduron | Enw | aspirate mutation of cliniaduron. | |
| 871 | choginiaist | Berf | /χɔˈɡɪnjai̯sd/ | aspirate mutation of coginiaist. |
| 872 | chogyddesau | Enw | /ˌχɔɡəˈðɛsaɨ̯/ | aspirate mutation of cogyddesau. |
| 873 | cholomennod | Enw | aspirate mutation of colomennod. | |
| 874 | chomiwnyddol | Ansoddair | aspirate mutation of comiwnyddol. | |
| 875 | chorachiaid | Enw | aspirate mutation of corachiaid. | |
| 876 | choronafeirws | Enw | /χɔˈrɔnaˌvei̯rʊs/ | aspirate mutation of coronafeirws. |
| 877 | chorunllwyd | Ansoddair | aspirate mutation of corunllwyd. | |
| 878 | chudyll coch bach | Enw | aspirate mutation of cudyll coch bach. | |
| 879 | chudyllod cochion bach | Enw | aspirate mutation of cudyllod cochion bach. | |
| 880 | chwaer yng nghyfraith | Enw | ||
| 881 | chwarae cŵn cadno | Enw | ||
| 882 | chwaraegarwch | Enw | /χwareɨ̯ˈɡarʊχ/ | playfulness. |
| 883 | chwarenglwyf | Enw | /ˌχwarɛŋˈɡluːɨ̯v/ | glandular fever, mononucleosis. |
| 884 | chwareüsrwydd | Enw | /χwarɛˈɨ̞srʊɨ̯ð/ | alternative spelling of chwareüsrwydd (“playfulness”). |
| 885 | chwarren y ffolen | Enw | popliteal gland. | |
| 886 | chwe ar hugain | Ansoddair | twenty-five (before nouns). | |
| 887 | chwe deg dau | Ansoddair | thirty-two. | |
| 888 | chwe deg dwy | Ansoddair | thirty-two. | |
| 889 | chwe deg naw | Ansoddair | sixty-nine. | |
| 890 | chwe deg un | Ansoddair | sixty-one. | |
| 891 | chwech ar hugain | Ansoddair | /ˌχweːχ ar ˈhɪɡai̯n/ | Equivalent to 'twenty-six': The cardinal number immediately following twenty-five and preceding twenty-seven. |
| 892 | chweched ar hugain | Ansoddair | /ˌχwɛχɛd ar ˈhɪɡai̯n/ | twenty-sixth. |
| 893 | chwecheiniog | Enw | /χwɛˈχei̯njɔɡ/ | sixpenny bit. |
| 894 | chwedleugar | Enw | ||
| 895 | chwedloniaeth | Enw | Equivalent to 'Mythology': The collection of myths of a people, concerning the origin of the people, history, deities, a… | |
| 896 | chweinllys y gors | Enw | ||
| 897 | chweinllys y maes | Enw | ||
| 898 | chweinllys y morfa | Enw | ||
| 899 | chwenychgar | Enw | ||
| 900 | chwerthin am ben | Enw | ||
| 901 | chwerthin ar ben | Enw | ||
| 902 | chwerthinllyd | Enw, Ansoddair | /χwɛrˈθɪnɬɨ̞d/ | Equivalent to 'Risible': Qui est digne de moquerie (se dit surtout pour des choses plutôt que pour des personnes). |
| 903 | chwerthinog | Ansoddair | /χwɛrˈθɪnɔɡ/ | |
| 904 | chwerwlys y mur | Enw | ||
| 905 | chwerwyn yr ardd | Enw | ||
| 906 | chwilfriwio | Enw | ||
| 907 | chwiliaduron | Enw | ||
| 908 | chwiliedydd | Enw | /χwɪlˈjɛdɨ̞ð/ | investigator, searcher. |
| 909 | chwim-chwam | Enw | ||
| 910 | chwistrelliad | Enw | ||
| 911 | chwit-chwat | Enw, Ansoddair | /ˈχwɪtˌχwat/ | frivolous person. |
| 912 | chwith-glicio | Enw, Berf | /ˌχwiːθˈɡlɪkjɔ/ | to left-click. |
| 913 | chwithigrwydd | Enw | ||
| 914 | chwiwladrata | Enw | ||
| 915 | chwydd y gwddf | Enw | Equivalent to 'goitre': An enlargement of the front and sides of the neck caused by inflammation of the thyroid gland. | |
| 916 | chwyddiannau | Enw | /χwəðˈjanaɨ̯/ | |
| 917 | chwyddleisydd | Enw | loudhailer, megaphone. | |
| 918 | chwŷf na chwŷf | Enw | step by step. | |
| 919 | chwyrligwgan | Enw | Equivalent to 'carousel': A pleasure ride, typically found at amusement parks and fairs and accompanied by music, consis… | |
| 920 | chwysigen y ganwraidd | Enw | ||
| 921 | chwysigennog | Enw | ||
| 922 | chyfalafiaeth | Enw | aspirate mutation of cyfalafiaeth. | |
| 923 | chyfareddau | Enw | aspirate mutation of cyfareddau. | |
| 924 | chyfarfodydd | Enw | aspirate mutation of cyfarfodydd (“meetings”). | |
| 925 | chyfeillgar | Ansoddair | aspirate mutation of cyfeillgar. | |
| 926 | chyfeillion | Enw | /χəˈvei̯ɬjɔn/ | aspirate mutation of cyfeillion. |
| 927 | chyfforddus | Ansoddair | /χəˈfɔrðɨ̞s/ | aspirate mutation of cyfforddus. |
| 928 | chyfiawnder | Enw | /χəvˈjau̯ndɛr/ | aspirate mutation of cyfiawnder. |
| 929 | chyfoethocach | Ansoddair | /ˌχəvɔɨ̯ˈθɔkaχ/ | aspirate mutation of cyfoethocach. |
| 930 | chyfoethocaf | Ansoddair | /ˌχəvɔɨ̯ˈθɔkav/ | aspirate mutation of cyfoethocaf. |
| 931 | chyfoethoced | Ansoddair | aspirate mutation of cyfoethoced. | |
| 932 | chyfoethogion | Ansoddair | /ˌχəvɔɨ̯ˈθɔɡjɔn/ | aspirate mutation of cyfoethogion. |
| 933 | chyfreithiwr | Enw | /χəvˈrei̯θjʊr/ | aspirate mutation of cyfreithiwr. |
| 934 | chyfrifiadur | Enw | aspirate mutation of cyfrifiadur. | |
| 935 | chyfrinachau | Enw | aspirate mutation of cyfrinachau. | |
| 936 | chyfystyron | Enw | aspirate mutation of cyfystyron. | |
| 937 | chylchfannau | Enw | aspirate mutation of cylchfannau (“traffic circles”). | |
| 938 | chylchgrawn | Enw | /ˈχəlχɡrau̯n/ | aspirate mutation of cylchgrawn (“magazine”). |
| 939 | chymedrolwr | Enw | /ˌχəmɛdˈrɔlʊr/ | aspirate mutation of cymedrolwr. |
| 940 | chymedrolwyr | Enw | /ˌχəmɛdˈrɔlwɨ̞r/ | aspirate mutation of cymedrolwyr. |
| 941 | chynffonddu | Ansoddair | aspirate mutation of cynffonddu. | |
| 942 | chyngherddau | Enw | aspirate mutation of cyngherddau. | |
| 943 | chynhadledd | Enw | /χənˈhadlɛð/ | aspirate mutation of cynhadledd (“conference”). |
| 944 | chynulleidfa | Enw | aspirate mutation of cynulleidfa. | |
| 945 | chysylltiad | Enw | aspirate mutation of cysylltiad (“connection”). | |
| 946 | chysyniadau | Enw | aspirate mutation of cysyniadau. | |
| 947 | chythreuliaid | Enw | /χəθˈreɨ̯ljai̯d/ | aspirate mutation of cythreuliaid. |
| 948 | ci blaidd llwyd | Enw | ||
| 949 | cigwrthodaeth | Enw | vegetarianism. | |
| 950 | cigwrthodwr | Enw | Equivalent to 'Vegetarian': A person who does not eat animal flesh, or, in some cases, use any animal products. | |
| 951 | cigwrthodwyr | Enw | ||
| 952 | cigydd glas Tsieina | Enw | ||
| 953 | cigydd mawr deheuol | Enw | Iberian grey shrike, southern grey shrike (Lanius meridionalis). | |
| 954 | cigydd-danagr | Enw | shrike-tanager (Lanio spp.). | |
| 955 | cigyddiaeth | Enw | ||
| 956 | cilchwarren | Enw | Equivalent to 'Tonsil': Any of various small masses of lymphoid tissues. | |
| 957 | cip y cerrig | Enw | stonecrop (Sedum spp.). | |
| 958 | claddedigaeth | Enw | ||
| 959 | claddedigol | Enw, Ansoddair | burial; funereal. | |
| 960 | claf o gariad | Enw | ||
| 961 | clafrllys y maes | Enw | ||
| 962 | clafrllys y mynydd | Enw | ||
| 963 | clafrllys yr ardd | Enw | ||
| 964 | clafrllys yr ŷd | Enw | ||
| 965 | clais yr hydd | Enw | dog's mercury (Mercurialis perennis). | |
| 966 | clasuroldeb | Enw | ||
| 967 | clasurolrwydd | Enw | ||
| 968 | clatsh y cŵn | Enw | ||
| 969 | cledd yng nghledd | Enw | ||
| 970 | cleddgludydd | Enw | ||
| 971 | clefyd y galon | Enw | /ˌklɛvɨ̞d ə ˈɡalɔn/ | heart disease. |
| 972 | clefyd y gwair | Enw | /ˌklɛvɨ̞d ə ˈɡwai̯r/ | Equivalent to 'Hay fever': An allergy to the pollen of grass or other plants that causes symptoms similar to those of a… |
| 973 | clefyd y siwgr | Enw | ||
| 974 | clefyd y Sul | Enw | /ˌklɛvɨ̞d ə ˈsɨːl/ | sickness feigned in order to avoid church-going, "Sundayitis". |
| 975 | clefyd yr haul | Enw | ||
| 976 | clindarddach | Enw, Berf | /klɪnˈdarðaχ/ | crackling, rattling. |
| 977 | cliniaduron | Enw | ||
| 978 | cloch y march | Enw | yellow rattle (Rhinanthus minor). | |
| 979 | clocio i mewn | Berf | to clock in, to clock on. | |
| 980 | cloffrwym y cythraul | Enw | ||
| 981 | cloffrwym y mwci | Enw | ||
| 982 | cloffrwyn y mwci | Enw | ||
| 983 | clorobensen | Enw | nitrobenzene (aromatic compound C₆H₅NO₂). | |
| 984 | cloron y moch | Enw | /ˌklɔrɔn ə ˈmoːχ/ | summer truffles (Tuber aestivum). |
| 985 | cluniaduron | Enw | ||
| 986 | clust llygoden pedwar-gwryw | Enw | ||
| 987 | clust y llygoden | Enw | mouse-ear hawkweed (Pilosella officinarum syn. Hieracium pilosella). | |
| 988 | clustlys garw bychan | Enw | lesser rough earwort (Scapania aequiloba). | |
| 989 | clustlys llygad ffynnon | Enw | marsh earwort (Scapania uliginosa). | |
| 990 | clustlys troed aderyn | Enw | bird's-foot earwort (Scapania ornithopodioides). | |
| 991 | clustlys y calch | Enw | calcicolous earwort (Scapania calcicola). | |
| 992 | clustlys y cysgod | Enw | shady earwort (Scapania umbrosa). | |
| 993 | clustlys y gogledd | Enw | northern earwort (Scapania subalpina). | |
| 994 | clustlys y gors | Enw | bog earwort (Scapania paludicola). | |
| 995 | clustlys y nant | Enw | water earwort (Scapania undulata). | |
| 996 | clustlys y waun | Enw | heath earwort (Scapania irrigua). | |
| 997 | clustlys y wig | Enw | grove earwort (Scapania nemorea). | |
| 998 | clwyf y marchogion | Enw | ||
| 999 | clwyfus o gariad | Enw | ||
| 1000 | clych y march | Enw | ||
| 1001 | clych y perthi | Enw | ||
| 1002 | clychau'r tylwyth teg | Enw | ||
| 1003 | clychlys dail danadl | Enw | ||
| 1004 | clymu godre'r cymylau | Enw, Berf | to stop the rain. | |
| 1005 | cnau aur onnenddail | Enw | ||
| 1006 | cnawdnychiad | Enw | /ˌknau̯dˈnəχjad/ | infarction. |
| 1007 | cnawdnychiant | Enw | /ˌknau̯dˈnəχjant/ | infarction. |
| 1008 | cnawdoledig | Enw, Ansoddair | incarnate, incarnated. | |
| 1009 | cneuen y forddwyd | Enw | singulative of cnau'r forddwydydd (“pope's eyes”). | |
| 1010 | cneuen y màs | Enw | ||
| 1011 | cneuen yr India | Enw | ||
| 1012 | cnocell aur felynwerdd | Enw | ||
| 1013 | cnocell dorgoch fawr | Enw | ||
| 1014 | cnocell fannog felynwerdd | Enw | ||
| 1015 | cnocell fraith fwyaf | Enw | Equivalent to 'great spotted woodpecker': A species of woodpecker, Dendrocopos major. | |
| 1016 | cnocell gopog gefnwen | Enw | ||
| 1017 | cnocell y coed | Enw | woodpecker (Picidae spp.). | |
| 1018 | cnwp-fwsogl | Enw | /ˌknʊpˈvʊsɔɡl/ | common clubmoss, stag's-horn clubmoss (Lycopodium clavatum). |
| 1019 | cnwp-fwsogl Alpaidd croesryw | Enw | Issler's clubmoss (Diphasiastrum × issleri, a hybrid between Diphasiastrum alpinum and Diphasiastrum complanatum). | |
| 1020 | cnwp-fwsogl corn carw | Enw | stag's-horn clubmoss (Lycopodium clavatum). | |
| 1021 | cnwp-fwsogl corn hydd | Enw | stag's-horn clubmoss (Lycopodium clavatum). | |
| 1022 | cnwp-fwsogl y gors | Enw | marsh clubmoss (Lycopodiella inundata). | |
| 1023 | coch y berllan | Enw | /ˌkoːχ ə ˈbɛrɬan/ | bullfinch (Pyrrhula spp.), especially the Eurasian bullfinch (Pyrrhula pyrrhula). |
| 1024 | coch y goes | Enw | common redshank (Tringa totanus). | |
| 1025 | cochion y berllan | Enw | ||
| 1026 | coden fwg gennog | Enw | ||
| 1027 | coed cwins Tsieina | Enw | ||
| 1028 | coedwig law'r Amason | Enw | Amazon Rainforest (a forest in South America). | |
| 1029 | coedwigaeth | Enw | ||
| 1030 | coeg-hocys y paith | Enw | prairie mallows, white checkerblooms (Sidalcea candida). | |
| 1031 | coegberllys | Enw | fool's parsley (Aethusa cenapium). | |
| 1032 | coegfalchder | Enw | vanity, conceit, (negative) pride. | |
| 1033 | coegylfinir | Enw | Equivalent to 'Whimbrel': A large migratory wading bird, Numenius phaeopus, of the family Scolopacidae, with a long down… | |
| 1034 | coesyn brau bonfelyn | Enw | ||
| 1035 | coesyn brau brith | Enw | ||
| 1036 | coesyn brau clystyrog | Enw | ||
| 1037 | coesyn brau eddïog | Enw | ||
| 1038 | coesyn brau gwelw | Enw | ||
| 1039 | coesyn brau gwinau | Enw | ||
| 1040 | coesyn brau mân-wreiddiog | Enw | ||
| 1041 | coesyn brau Mediwsa | Enw | ||
| 1042 | coesyn brau moresg | Enw | ||
| 1043 | coesyn brau pig | Enw | ||
| 1044 | coesyn brau unig | Enw | ||
| 1045 | coesyn brau'r bonion | Enw | ||
| 1046 | coesyn brau'r gwanwyn | Enw | ||
| 1047 | coesyn pengrwn cennog | Enw | ||
| 1048 | coesyn pengrwn gaeaf | Enw | ||
| 1049 | coesyn pengrwn gwyn | Enw | ||
| 1050 | coesyn pengrwn heglog | Enw | ||
| 1051 | coesyn pengrwn rhisglog | Enw | ||
| 1052 | coesyn yr ymennydd | Enw | Equivalent to 'brain stem': The part of the brain that connects the spinal cord to the cerebrum and the rest of the fore… | |
| 1053 | cof fel gogor | Enw | ||
| 1054 | cof fel rhidyll | Enw | ||
| 1055 | coffadwriaeth | Enw | ||
| 1056 | cofiaduriaid | Enw | ||
| 1057 | cofrestredig | Enw | ||
| 1058 | cofrestrfeydd | Enw | /ˌkɔvresdrˈveɨ̯ð/ | |
| 1059 | cofrestriad | Enw | /kɔvˈrɛsdrjad/ | registration. |
| 1060 | cofrestriadau | Enw | /ˌkɔvrɛsˈdrjadaɨ̯/ | |
| 1061 | cofrestrydd | Enw | /kɔvˈrɛsdrɨ̞ð/ | registrar. |
| 1062 | cog efydd Papwa | Enw | New Guinea bronze cuckoo (Chalcites poecilurus). | |
| 1063 | cog-gigydd Gini Newydd | Enw | ||
| 1064 | cog-gigydd wynebddu’r Dwyrain | Enw | ||
| 1065 | cog-gigydd wynebddu’r Gorllewin | Enw | ||
| 1066 | cogwalch copog () | Enw | ||
| 1067 | colomen ffrwythau dorgoch | Enw | purple-tailed imperial pigeon, rufous-bellied fruit pigeon (Ducula rufigaster). | |
| 1068 | colomen ffrwythau yddflwyd | Enw | spotted imperial pigeon, grey-necked imperial pigeon, grey-necked fruit pigeon (Ducula carola). | |
| 1069 | colomen gopog Awstralia | Enw | ||
| 1070 | colomen werdd fochlwyd | Enw | ||
| 1071 | comisiynwyr | Enw | ||
| 1072 | comisiynydd | Enw | Equivalent to 'commissioner': Alternative form of European Commissioner. | |
| 1073 | comiwnyddol | Ansoddair | /kɔmjʊˈnəðɔl/ | Equivalent to 'communist': An advocate of a society based on the common ownership of property; a proponent of communism. |
| 1074 | condemniedig | Ansoddair | condemned. | |
| 1075 | cont y môr | Enw | jellyfish. | |
| 1076 | coperniciwm | Enw | /ˌkɔpɛrˈnɪkjʊm/ | Equivalent to 'copernicium': The transuranic chemical element (symbol Cn) with atomic number 112. |
| 1077 | copog goed benwyn | Enw | ||
| 1078 | copog goed bigddu | Enw | ||
| 1079 | copog goed bigsyth | Enw | ||
| 1080 | copog goed borffor | Enw | ||
| 1081 | copog goed grymanbig | Enw | ||
| 1082 | copog goed werdd | Enw | ||
| 1083 | côr y goedwig | Enw | the woodland choir (wild birds singing). | |
| 1084 | côr y wig | Enw | the woodland choir (wild birds singing). | |
| 1085 | cordylluan y mynydd | Enw | ||
| 1086 | corffluniwr | Enw | /kɔrfˈlɨ̞njʊr/ | Equivalent to 'Bodybuilder': A person who uses diet and exercise to build an aesthetically muscular physique, in order t… |
| 1087 | corfflunwyr | Enw | /(ˌ)kɔrfˈlɨ̞nwɨ̞r/ | |
| 1088 | corffluoedd | Enw | /kɔrfˈlɨː.ɔɨ̯ð/ | |
| 1089 | corfforaeth | Enw | ||
| 1090 | corfforaethol | Enw | ||
| 1091 | corfforedig | Enw | ||
| 1092 | corgimychiaid | Enw | ||
| 1093 | corhedydd y waun | Enw | ||
| 1094 | Corinthaidd | Enw, Ansoddair | Corinthian, pertaining to Corinth. | |
| 1095 | corn carw'r mynydd | Enw | stag's-horn clubmoss (Lycopodium clavatum). | |
| 1096 | corn yr hydd | Enw | ||
| 1097 | cornbig bach du | Enw | black dwarf hornbill (Tockus hartlaubi). | |
| 1098 | cornbig bach picoch | Enw | red-billed dwarf hornbill (Tockus camurus). | |
| 1099 | cornbig bach Swlawesi | Enw | Temminck's hornbill (Penelopides exarhatus). | |
| 1100 | cornicyll y dŵr | Enw | ||
| 1101 | coronafeirws | Enw | /kɔˈrɔnaˌvei̯rʊs/ | coronavirus. |
| 1102 | coronafirws | Enw | /kɔˈrɔnaˌvɪrʊs/ | coronavirus. |
| 1103 | costusrwydd | Enw | ||
| 1104 | crach-hwyad | Enw | ||
| 1105 | crach-hwyaid | Enw | ||
| 1106 | craf y geifr | Enw | /ˌkraːv ə ˈɡei̯vr/ | ramsons, wild garlic. |
| 1107 | crafanc y frân | Enw | crowsfoot, buttercup (Ranunculus). | |
| 1108 | crafanc yr arth | Enw | especially bear's-foot, stinking hellebore (Helleborus foetidus). | |
| 1109 | crafanc-yr-arth y Grawys | Enw | Lenten rose (Helleborus orientalis). | |
| 1110 | crafion y cerrig | Enw | stonecrop (Sedum spp.). | |
| 1111 | cramen y cerrig | Enw | lichen (on rocks). | |
| 1112 | crasboethder | Enw | /krasˈbɔɨ̯θdɛr/ | torridity, dry heat. |
| 1113 | crasddadrwydd | Enw | /ˌkraːsˈðadrʊɨ̯ð/ | |
| 1114 | creadigaeth | Enw | creation, invention (thing which is created). | |
| 1115 | creadigrwydd | Enw | creativity. | |
| 1116 | creaduriaid | Enw | ||
| 1117 | crec morgrug gogleddol | Enw | ||
| 1118 | crec yr eithin | Enw | Equivalent to 'whinchat': A small Old World songbird, Saxicola rubetra, that feeds on insects. | |
| 1119 | crefftwaith | Enw | craftsmanship, craftwork, handicraft. | |
| 1120 | crefftwriaeth | Enw | ||
| 1121 | cregyniaeth | Enw | ||
| 1122 | cregynnaidd | Enw | ||
| 1123 | creigberllys | Enw | ||
| 1124 | creisionllyd | Ansoddair | /krei̯ˈʃɔnɬɨ̞d/ | Equivalent to 'Crunchy': An infantryman, as opposed to a tanker (combatant manning a tank). |
| 1125 | crensh y cŵn | Enw | ||
| 1126 | crestannaidd | Enw | ||
| 1127 | crëyr mawr gwyn | Enw | great white egret, great egret (Ardea alba). | |
| 1128 | crëyr pyllau Tsieina | Enw | ||
| 1129 | crëyr traethau dwyreiniol | Enw | ||
| 1130 | crëyr traethau gorllewinol | Enw | ||
| 1131 | crëyr y gwartheg | Enw | cattle egret (Bubulcus ibis). | |
| 1132 | crëyr y nos | Enw | black-crowned night heron, night heron (Nycticorax nycticorax). | |
| 1133 | criafol y bwci | Enw | dogrose hips, the fruit of the dogrose plant (Rosa canina). | |
| 1134 | criafol y moch | Enw | hawthorn berries, haws, the fruit of hawthorn plants (Crataegus). | |
| 1135 | criafolbren | Enw | ||
| 1136 | criafolen y bwci | Enw | ||
| 1137 | crib y bleiddiau | Enw | ||
| 1138 | cribddeilio | Berf | ||
| 1139 | cribell felen fawr | Enw | greater yellow rattle (Rhinanthus major, syn. Rhinanthus angustifolius). | |
| 1140 | cric y berth | Enw | ||
| 1141 | crinllys y gors | Enw | ||
| 1142 | crintachrwydd | Enw | /krɪnˈtaχrʊɨ̯ð/ | stinginess, miserliness. |
| 1143 | crochanbwll | Enw | ||
| 1144 | crochenwaith | Enw | Equivalent to 'Earthenware': An opaque, semi-porous ceramic made from clay and other compounds. | |
| 1145 | crochlefain | Enw, Berf | /krɔχˈlɛvai̯n/ | Equivalent to 'shout': A loud burst of voice or voices; a violent and sudden outcry, especially that of a multitude expr… |
| 1146 | crocodeilaidd | Enw | ||
| 1147 | crocodeilod | Enw | /ˌkrɔkɔˈdei̯lɔd/ | |
| 1148 | croen y tarw | Enw | coltsfoot (Tussilago farfara). | |
| 1149 | croes yr hwyr | Enw | dame's-violet, dame's rocket, sweet rocket, night-scented gilliflower (Hesperis matronalis). | |
| 1150 | croesffordd | Enw | /ˈkrɔɨ̯sfɔrð/ | crossroads. |
| 1151 | croeshoeliad | Enw | /krɔɨ̯sˈhɔɨ̯ljad/ | crucifixion. |
| 1152 | croeshoelio | Enw, Berf | /krɔɨ̯sˈhɔɨ̯ljɔ/ | to crucify. |
| 1153 | croesholiad | Enw | ||
| 1154 | croestoriad | Enw | /krɔɨ̯sˈdɔrjad/ | Equivalent to 'cross section': A section formed by a plane cutting through an object, usually at right angles to an axis… |
| 1155 | crogengranc | Enw | ||
| 1156 | crogennaidd | Enw | ||
| 1157 | cromlin ddaduniad ocsigen-haemoglobin | Enw | ||
| 1158 | cromlin gydbwysedd ocsigen-haemoglobin | Enw | ||
| 1159 | cropiwr daear cennog | Enw | ||
| 1160 | croth y goes | Enw | Equivalent to 'Calf': A young cow or bull of any bovid, such as domestic cattle or buffalo. | |
| 1161 | crwban môr gwyrdd | Enw | Equivalent to 'green sea turtle': Any of species Chelonia mydas of large sea turtles, the only species of the genus Chel… | |
| 1162 | crwban môr lledrgefn | Enw | ||
| 1163 | crwban y môr | Enw | Equivalent to 'turtle': Any land or marine reptile of the order Testudines, characterised by a protective shell enclosin… | |
| 1164 | crwynllys y gors | Enw | ||
| 1165 | crybwylliad | Enw | mention, reference, allusion. | |
| 1166 | crybwylliadau | Enw | ||
| 1167 | crybwyllion | Enw | ||
| 1168 | crychneidio | Enw, Berf | /ˌkrəχˈnei̯djɔ/ | to caper, to skip, to caper. |
| 1169 | crychneidiol | Enw | ||
| 1170 | crychydd y nos | Enw | ||
| 1171 | crychyddion | Enw | /krəˈχəðjɔn/ | |
| 1172 | crymanddail | Ansoddair | sickle-leaved, having sickle-shaped leaves. | |
| 1173 | crys y brenin | Enw | henbane (Hyoscyamus niger). | |
| 1174 | cudyll coch bach | Enw | /ˌkɨ̞dɨ̞ɬ ˌkoːχ ˈbaːχ/ | lesser kestrel, Falco naumanni. |
| 1175 | cudyllod cochion bach | Enw | /kɨˌdəɬɔd ˌkoːχ ˈbaːχ/ | |
| 1176 | cwcal Prydain Newydd | Enw | ||
| 1177 | cwcwll y mynach | Enw | monkshood, aconite (Aconitum napellus). | |
| 1178 | cwlwm y coed | Enw | bindweed (Convulvus ssp. and other plants of family Convolvulaceae). | |
| 1179 | cwlwm y cythraul | Enw | field bindweed (Convolvulus arvensis). | |
| 1180 | cwlwm y gwŷdd | Enw | black bryony (Dioscorea communis, syn. Tamus communis). | |
| 1181 | cwlwm yr asgwrn | Enw | dog's mercury (Mercurialis perennis). | |
| 1182 | cwning-gaer | Enw | /kʊˈnɪŋɡaɨ̯r/ | rabbit warren. |
| 1183 | cwpaneidiau | Enw | /ˌkʊpaˈnei̯djaɨ̯/ | |
| 1184 | cwtiad yr aur | Enw | ||
| 1185 | cwtiar gopog () | Enw | ||
| 1186 | cwtyn hirgoes adeinddu | Enw | ||
| 1187 | cwympo i lawr | Enw | ||
| 1188 | cwyrbif morgrug wynepgoch | Enw | ||
| 1189 | cychwynnydd | Enw | ||
| 1190 | cyd-deithiwr | Enw | ||
| 1191 | cyd-destunau | Enw | ||
| 1192 | cyd-destunol | Enw, Ansoddair | contextual. | |
| 1193 | cydanrhydedd | Enw | /ˌkidanˈhrədɛð/ | joint honours. |
| 1194 | cydblethiad | Enw | ||
| 1195 | cydbreswylio | Enw | ||
| 1196 | cydbreswylwyr | Enw | /ˌkɨːdbrɛˈsʊɨ̯lwɨ̞r/ | cohabitants, fellow residents. |
| 1197 | cydbreswylydd | Enw | Equivalent to 'Cohabitant': A person who cohabits with another. | |
| 1198 | cydfrawd yng nghyfraith | Enw | ||
| 1199 | cydgefnogaeth | Enw | mutual support, solidarity. | |
| 1200 | cydgynulliad | Enw | ||
| 1201 | cydgysylltu | Enw | ||
| 1202 | cydlifiadau | Enw | /ˌkədlɪvˈjadaɨ̯/ | |
| 1203 | cydllin y mynydd | Enw | ||
| 1204 | cydnabyddiad | Enw | ||
| 1205 | cydnabyddion | Enw | ||
| 1206 | cydnabyddus | Enw | ||
| 1207 | cydraddoldeb | Enw | Equivalent to 'equality': The state of being equivalent:equation, equivalence, equivalency, par, parity, sameness. | |
| 1208 | cydsyniadau | Enw | ||
| 1209 | cydweithiad | Enw | /ˌkɨːdˈwei̯θjad/ | cooperation. |
| 1210 | cydweithiwr | Enw | /ˌkɨːdˈwei̯θjʊr/ | co-worker, cooperator. |
| 1211 | cydweithredol | Enw | ||
| 1212 | cydweithredu | Enw, Berf | /ˌkɨːdwei̯θˈrɛdɨ/ | to cooperate. |
| 1213 | cydweithredwr | Enw | /ˌkɨːdwei̯θˈrɛdʊr/ | co-worker, cooperator, collaborator. |
| 1214 | cydweithwyr | Enw | /ˌkɨːdˈwei̯θwɨ̞r/ | |
| 1215 | cydwelediad | Enw | /ˌkɨ̞dwɛˈlɛdjad/ | agreement (state whereby two or more parties share a view or opinion). |
| 1216 | cydwladoldeb | Enw | internationalism. | |
| 1217 | cydwybodoldeb | Enw | ||
| 1218 | cydymdeimlad | Enw | /ˌkɨːdəmˈdei̯mlad/ | |
| 1219 | cyfaddasiad | Enw | /kəvaˈðaʃad/ | adaptation, modification, adjustment. |
| 1220 | cyfaddasrwydd | Enw | ||
| 1221 | cyfaddefiad | Enw | /ˌkəvaˈðɛvjad/ | admission, confession. |
| 1222 | cyfagosrwydd | Enw | ||
| 1223 | cyfalafiaeth | Enw | /ˌkəvaˈlavjaɨ̯θ/ | Equivalent to 'capitalism': A socio-economic system based on private ownership of resources or capital. |
| 1224 | cyfansoddair | Enw | Equivalent to 'compound word': A word composed of two or more stems. | |
| 1225 | cyfansoddiad | Enw | /kəvanˈsɔðjad/ | composition, actually of composing. |
| 1226 | cyfansymiau | Enw | /ˌkəvanˈsəmjaɨ̯/ | |
| 1227 | cyfarfodydd | Enw | /ˌkəvarˈvɔdɨ̞ð/ | |
| 1228 | cyfarfyddiad | Enw | ||
| 1229 | cyfartaledd | Enw | /kəvarˈtalɛð/ | average, mean. |
| 1230 | cyfarthiadau | Enw | /ˌkəvarθˈjadaɨ̯/ | |
| 1231 | cyfarwyddiad | Enw | direction, instruction, guidance, advice; recipe, prescription. | |
| 1232 | cyfarwyddwr | Enw | /kəvaˈrʊɨ̯ðʊr/ | |
| 1233 | cyfarwyddwyr | Enw | /ˌkəvaˈrʊɨ̯ðwɨ̞r/ | |
| 1234 | cyfarwyddyd | Enw | ||
| 1235 | cyfatebiaeth | Enw | /ˌkəvaˈtɛbjaɨ̯θ/ | correspondence (agreement with an expected outcome). |
| 1236 | cyfeiliornad | Enw | ||
| 1237 | cyfeiliornus | Enw, Ansoddair | /kəvei̯lˈjɔrnɨ̞s/ | deviant, false, wrong. |
| 1238 | cyfeillesau | Enw | ||
| 1239 | cyfeillgarwch | Enw | /ˌkəveɨ̯ɬˈɡarʊχ/ | friendliness, friendship, amity. |
| 1240 | cyfeiriadau | Enw | Equivalent to 'address': Direction. | |
| 1241 | cyfeiriadur | Enw | Equivalent to 'directory': A list of names, addresses etc, of specific classes of people or organizations, often in alph… | |
| 1242 | cyfeiriaduron | Enw | ||
| 1243 | cyfeirnodau | Enw | /ˌkəvei̯rˈnɔdaɨ̯/ | |
| 1244 | cyferbynadwy | Enw | ||
| 1245 | cyferbyniad | Enw | /kəvɛrˈbənjad/ | opposition (act of opposing). |
| 1246 | cyferbyniol | Ansoddair | /kəvɛrˈbənjɔl/ | opposite, opposing, contrasting, different. |
| 1247 | cyferbynnedd | Enw | /kəvɛrˈbənɛð/ | contrast (difference in lightness, brightness and/or hue between two colours). |
| 1248 | cyffeithiad | Enw | ||
| 1249 | cyffeithiedig | Enw | ||
| 1250 | cyffeithiwr | Enw | ||
| 1251 | cyffelybiaeth | Enw | ||
| 1252 | cyffredinol | Ansoddair | /ˌkəfrɛˈdɪnɔl/ | |
| 1253 | cyffyrddiad | Enw | ||
| 1254 | cyffyrddlin | Enw | ||
| 1255 | cyfieithiad | Enw | Equivalent to 'translation': The conversion of text from one language to another. | |
| 1256 | cyfieithydd | Enw | /kəvˈjei̯θɨ̞ð/ | person of the same language or race as another, fellow-countryman. |
| 1257 | cyflafaredd | Enw | /ˌkəvlaˈvarɛð/ | discourse, discussion. |
| 1258 | cyflafareddu | Enw, Berf | /ˌkəvlavaˈrɛðɨ/ | to confer, to discuss. |
| 1259 | cyflafareddwr | Enw | /ˌkəvlavaˈrɛðʊr/ | Equivalent to 'referee': An umpire or judge; an official who makes sure the rules are followed during a game. |
| 1260 | cyflenwad a galw | Enw | Equivalent to 'supply and demand': A capitalistic model of price determination in a market, according to which, holding… | |
| 1261 | cyflinellog | Enw | ||
| 1262 | cyfnewidiadwy | Enw | ||
| 1263 | cyfnewidiog | Enw, Ansoddair | ||
| 1264 | cyfnewidiol | Enw, Ansoddair | changeable, variable. | |
| 1265 | cyfnodolion | Enw | /ˌkəvnɔˈdɔljɔn/ | |
| 1266 | cyfoethocach | Ansoddair | /ˌkəvɔɨ̯ˈθɔkaχ/ | comparative degree of cyfoethog. |
| 1267 | cyfoethocaf | Ansoddair | /ˌkəvɔɨ̯ˈθɔkav/ | superlative degree of cyfoethog. |
| 1268 | cyfoethoced | Ansoddair | /ˌkəvɔɨ̯ˈθɔkɛd/ | equative degree of cyfoethog. |
| 1269 | cyfoethogiad | Enw | /kəvɔɨ̯ˈθɔɡjad/ | enrichment. |
| 1270 | cyfoethogion | Ansoddair | /ˌkəvɔɨ̯ˈθɔɡjɔn/ | (Ansoddair). |
| 1271 | cyfranddaliad | Enw | ||
| 1272 | cyfranddaliwr | Enw | Equivalent to 'Shareholder': One who owns shares of stock in a corporation. | |
| 1273 | cyfranddalwyr | Enw | ||
| 1274 | cyfraniadau | Enw | ||
| 1275 | cyfranogiad | Enw | participation, partaking. | |
| 1276 | cyfranogiadau | Enw | ||
| 1277 | cyfranogion | Enw | ||
| 1278 | cyfranogwyr | Enw | ||
| 1279 | cyfreithiol | Enw, Ansoddair | /kəˈvrei̯θjɔl/ | Equivalent to 'legal': The legal department of a company or organization. |
| 1280 | cyfreithiwr | Enw | /kəvˈrei̯θjʊr/ | Equivalent to 'lawyer': A professional person with a graduate law degree that qualifies for legal work (such as Juris Do… |
| 1281 | cyfreithlon | Enw, Ansoddair | /kəˈvrei̯θlɔn/ | Equivalent to 'legal': The legal department of a company or organization. |
| 1282 | cyfreithloni | Enw | ||
| 1283 | cyfreithwraig | Enw | /kəvˈreiθwrai̯ɡ/ | |
| 1284 | cyfreithwyr | Enw | /kəvˈrei̯θwɨ̞r/ | |
| 1285 | cyfreithydd | Enw | Equivalent to 'Jurist': An expert of law or someone who researches jurisprudence. | |
| 1286 | cyfreithyddol | Enw | ||
| 1287 | cyfresoledd | Enw | ||
| 1288 | cyfrifiadau | Enw | ||
| 1289 | cyfrifiadur | Enw | /kəvrɪvˈjadɨ̞r/ | Equivalent to 'computer': A programmable electronic device that performs mathematical calculations and logical operation… |
| 1290 | cyfrifiadurol | Enw, Ansoddair | /ˌkəvrɪvjaˈdɨ̞rɔl/ | computer (attributive). |
| 1291 | cyfrifiaduron | Enw | ||
| 1292 | cyfrifiannau | Enw | ||
| 1293 | cyfrifiannell | Enw | /kəvrɪvˈjanɛɬ/ | Equivalent to 'Calculator': A mechanical or electronic device that performs mathematical calculations; sometimes, an ele… |
| 1294 | cyfrifiannu | Enw | ||
| 1295 | cyfriflyfrau | Enw | ||
| 1296 | cyfrifoldeb | Enw | /ˌkəvrɪˈvɔldɛb/ | responsibility. |
| 1297 | cyfrifoldebau | Enw | /ˌkəvrɪvɔlˈdɛbaɨ̯/ | |
| 1298 | cyfrifyddion | Enw | ||
| 1299 | cyfrinachau | Enw | ||
| 1300 | cyfrinachoedd | Enw | ||
| 1301 | cyfrinachol | Enw | Equivalent to 'private': A soldier of the lowest rank in the army. | |
| 1302 | cyfrineiriau | Enw | ||
| 1303 | cyfriniaeth | Enw | ||
| 1304 | cyfrodeddiad | Enw | ||
| 1305 | cyfryngiadau | Enw | /ˌkəvrəŋˈjadaɨ̯/ | |
| 1306 | cyfundrefnau | Enw | ||
| 1307 | cyfundrefnol | Enw, Ansoddair | /ˌkəvɨ̞nˈdrɛvnɔl/ | systematic. |
| 1308 | cyfundrefnu | Enw, Berf | /ˌkəvɨ̞nˈdrɛvnɨ/ | to systematise. |
| 1309 | cyfunrhywiol | Enw, Ansoddair | /ˌkəvɨ̞nˈr̥ɪu̯jɔl/ | Equivalent to 'homosexual': Sexually and/or romantically attracted to members of the same sex, such as a man who is attr… |
| 1310 | cyfweliadau | Enw | ||
| 1311 | cyfwerthedd | Enw | ||
| 1312 | cyfyng-gyngor | Enw | /ˌkəvɨ̞ŋˈɡəŋɔr/ | Equivalent to 'Quandary': A state of not knowing what to decide; a state of difficulty or perplexity; a state of uncerta… |
| 1313 | cyhuddiadau | Enw | ||
| 1314 | cyhydnos y gwanwyn | Enw | /kəˌhədnɔs ə ˈɡwanwɨ̞n/ | the vernal equinox. |
| 1315 | cyhydnos yr hydref | Enw | /kəˌhədnɔs ər ˈhədrɛv/ | the autumnal equinox. |
| 1316 | cyhyrogrwydd | Enw | /ˌkəhəˈrɔɡrʊɨ̯ð/ | muscularity, brawniness. |
| 1317 | cylchedwaith | Enw | /kəlˈχɛdwai̯θ/ | Equivalent to 'Circuitry': A specific system of electrical circuits in a particular device; (uncountable) the design of… |
| 1318 | cylchfannau | Enw | ||
| 1319 | cylchffordd | Enw | Equivalent to 'ring road': A circumferential highway around a town, city, or other conurbation. | |
| 1320 | cylchgronau | Enw | ||
| 1321 | cylchlythyr | Enw | Equivalent to 'circular letter': A freely distributed letter or pamphlet on routine matters. | |
| 1322 | cylchrediad | Enw | /kəlχˈrɛdjad/ | circulation. |
| 1323 | cylchymdaith | Enw | ||
| 1324 | cylion yr Ysbaen | Enw | ||
| 1325 | cymaint tra chymaint | Adferf | as much again. | |
| 1326 | cymariaethau | Enw | ||
| 1327 | cymdeithasau | Enw | ||
| 1328 | cymdeithasgar | Enw, Ansoddair | /kəmdei̯ˈθasɡar/ | sociable, gregarious. |
| 1329 | cymdeithasiad | Enw | ||
| 1330 | cymdeithasol | Ansoddair | /ˌkəmdei̯ˈθasɔl/ | Equivalent to 'social': A festive gathering to foster introductions. |
| 1331 | cymdeithion | Enw | ||
| 1332 | cymedroldeb | Enw | /ˌkəmɛdˈrɔldɛb/ | moderation (state or quality of being moderate). |
| 1333 | cymedrolder | Enw | ||
| 1334 | cymedrolwyr | Enw | /ˌkəmɛdˈrɔlwɨ̞r/ | |
| 1335 | cymeradwyaeth | Enw | ||
| 1336 | cymeradwyol | Ansoddair | /kəmɛraˈduɨ̯nɔl/ | approving, commendatory, endorsing. |
| 1337 | cymhariaeth | Enw | Equivalent to 'Simile': A figure of speech in which one thing is explicitly compared to another, using e.g. | |
| 1338 | cymheiriaid | Enw | ||
| 1339 | cymhelliant | Enw | ||
| 1340 | cymhlethdod | Enw | /kəmˈhlɛθdɔd/ | Equivalent to 'complexity': The state of being complex; intricacy; entanglement. |
| 1341 | cymhlethdodau | Enw | /ˌkəmhlɛθˈdɔdaɨ̯/ | |
| 1342 | Cymraeg ei iaith | Enw, Ansoddair | /kəmˈraːi̯ɡ ei̯ ˌjai̯θ/ | Welsh-speaking. |
| 1343 | cymryd i fyny | Enw, Berf | to take up, to undertake, to assume. | |
| 1344 | cymryd i mewn | Berf | to bring in. | |
| 1345 | cymryd mewn llaw | Enw, Berf | to take in hand, to begin. | |
| 1346 | cymryd y masgl | Enw | ||
| 1347 | cymwynasgar | Enw | ||
| 1348 | cymwysiadau | Enw | ||
| 1349 | cymwysterau | Enw | ||
| 1350 | cymysgeddau | Enw | ||
| 1351 | cyn bo hir | Enw, Adferf | /ˌkɨ̞n ˌboː ˈhiːr/ | Equivalent to 'soon': Short in length of time from the present. |
| 1352 | cynadleddau | Enw | ||
| 1353 | cynadleddfa | Enw | ||
| 1354 | cynadleddol | Enw | ||
| 1355 | cynadleddwr | Enw | ||
| 1356 | cynddeiriog | Enw, Ansoddair | Equivalent to 'Rabid': A human or animal infected with rabies. | |
| 1357 | cyndynrwydd | Enw | /kənˈdənrʊɨ̯ð/ | unwillingness, reluctance. |
| 1358 | cynefineiddio | Berf | /ˌkənɛvɪnˈai̯ðjɔ/ | to make acquainted. |
| 1359 | cynefinoedd | Enw | ||
| 1360 | cynffon sidan Japan | Enw | Japanese waxwing (Bombycilla japonica). | |
| 1361 | cynffon twrci ffug | Enw | ||
| 1362 | cynffon y cadno | Enw | meadow foxtail (Alopecurus pratensis). | |
| 1363 | cynffon y gath | Enw | common bulrush, broadleaf cattail (Typha latifolia). | |
| 1364 | cynffondaenwr Prydain Newydd | Enw | ||
| 1365 | cynffonfain | Ansoddair | /kənˈfɔnvai̯n/ | slender-tailed. |
| 1366 | cynffonwellt | Enw | foxtail (Alopecurus). | |
| 1367 | cynffonwellt y maes | Enw | meadow foxtail (Alopecurus pratensis). | |
| 1368 | cynffonwellt y mynydd | Enw | ||
| 1369 | cyngaf y coed | Enw | cleavers, sticky willy (Galium aparine). | |
| 1370 | cynganeddion | Enw | ||
| 1371 | cyngherddau | Enw | /kəŋˈhɛrðaɨ̯/ | |
| 1372 | cynghreiriau | Enw | ||
| 1373 | cynglennydd | Enw | ||
| 1374 | cynglennydd yr afon | Enw | ||
| 1375 | cynhadleddau | Enw | ||
| 1376 | cynhaliaeth | Enw | maintenance, upkeep. | |
| 1377 | cynheiliaid | Enw | ||
| 1378 | cynhwysfawr | Enw | ||
| 1379 | cynhyrchiol | Enw, Ansoddair | /kənˈhərχjɔl/ | flourishing, increasing. |
| 1380 | cynllwyngar | Enw | ||
| 1381 | cynnyrch gwladol crynswth | Enw | gross national product. | |
| 1382 | cynnyrch mewnwladol crynswth | Enw | gross domestic product. | |
| 1383 | cynorthwy-wyr | Enw | ||
| 1384 | cynorthwy-ydd | Enw | ||
| 1385 | cynorthwyol | Enw, Ansoddair | /kənɔrˈθuɨ̯ɔl/ | helping, assisting, auxiliary, subsidiary. |
| 1386 | cynorthwywr | Enw | ||
| 1387 | cynorthwywyr | Enw | /ˌkənɔrˈθʊɨ̯wɨ̞r/ | |
| 1388 | cynorthwyydd | Enw | /ˌkənɔrˈθʊɨ̯.ɨ̞ð/ | an assistant, a helper, an aid. |
| 1389 | cynrhychiol | Enw, Ansoddair | /kənˈr̥əχjɔl/ | present (time or placement). |
| 1390 | cynrychioli | Enw, Berf | /ˌkənrəχˈjɔli/ | to present, to presentiate. |
| 1391 | cynrychioliad | Enw | ||
| 1392 | cynrychiolydd | Enw | representative, delegate. | |
| 1393 | cynulleidfa | Enw | /kənɨ̞ˈɬei̯dva/ | Equivalent to 'audience': A group of people within hearing; specifically, a large gathering of people listening to or wa… |
| 1394 | cynulliadau | Enw | ||
| 1395 | cynulliadfa | Enw | ||
| 1396 | cyrhaeddais | Berf | /kərˈheɨ̯ðai̯s/ | |
| 1397 | cyrhaeddwch | Berf | /kərˈhaɨ̯ðʊχ/ | |
| 1398 | cyseiniant magnetig niwclear | Enw | ||
| 1399 | cysgadrwydd | Enw | /kəsˈɡadrʊɨ̯ð/ | sluggishness, torpor, inertia. |
| 1400 | cysgaduriaid | Enw | ||
| 1401 | cysglydrwydd | Enw | ||
| 1402 | cysgodluniau | Enw | /ˌkəsɡɔdˈlɨ̞njaɨ̯/ | |
| 1403 | cysgu fel clawdd | Enw, Berf | /ˌkəsɡɨ̞ vɛl ˈklau̯ð/ | sleep like a log, sleep like a baby. |
| 1404 | cysondeb y ffydd | Enw | analogy of faith, proportion of faith (the Reformed stance that passages in the Bible should only be interpreted in ligh… | |
| 1405 | cystadlaethau | Enw | /ˌkəsdadˈleɨ̯θaɨ̯/ | |
| 1406 | cystadleuaeth | Enw | /ˌkəsdadˈleɨ̯.aɨ̯θ/ | competition, contest. |
| 1407 | cystadleuol | Enw, Ansoddair | /ˌkəsdadˈleɨ̯.ɔl/ | competitive. |
| 1408 | cystadleuwr | Enw | /ˌkəsdadˈleɨ̯.ʊr/ | competitor, contestant. |
| 1409 | cystadleuwyr | Enw | /ˌkəsdadˈleɨ̯wɨ̞r/ | |
| 1410 | cystadleuydd | Enw | /ˌkəsdadˈleɨ̯.ɨ̞ð/ | |
| 1411 | cystrawennol | Ansoddair | syntactic, relating to syntax. | |
| 1412 | cysyllteiriau | Enw | /ˌkəsəɬˈdei̯rjaɨ̯/ | |
| 1413 | cysylltiadau | Enw | /ˌkəsəɬdˈjadaɨ̯/ | |
| 1414 | cysylltiedig | Ansoddair | connected, related. | |
| 1415 | cysylltnodau | Enw | /ˌkəsəɬdˈnɔdaɨ̯/ | |
| 1416 | cysylltyddion | Enw | /ˌkəsəɬˈdəðjɔn/ | |
| 1417 | cythreuliaid | Enw | /kəθˈreɨ̯ljai̯d/ | |
| 1418 | cythrybliad | Enw | ||
| 1419 | cytseiniaid | Enw | /kətˈsei̯njai̯d/ | |
| 1420 | cyweirio â heli | Enw | ||
| 1421 | cywilyddgar | Enw | ||
| 1422 | da i ddim | Enw, Ansoddair | good-for-nothing, worthless, useless. | |
| 1423 | dadansoddiad | Enw | Equivalent to 'analysis': Decomposition into components in order to study (a complex thing, concept, theory, etc.). | |
| 1424 | dadansoddiad isotop nitrogen | Enw | ||
| 1425 | dadansoddiad isotop ocsigen | Enw | ||
| 1426 | dadansoddol | Enw, Ansoddair | analytical. | |
| 1427 | dadansoddwr | Enw | Equivalent to 'Analyst': Someone who is an analytical thinker. | |
| 1428 | dadansoddwyr | Enw | ||
| 1429 | dadelfeniad | Enw | /dadɛlˈvɛnjad/ | decomposition, analysis. |
| 1430 | dadlwythodd | Berf | /(ˌ)dadˈlʊɨ̯θɔð/ | |
| 1431 | dadlwythwch | Berf | /(ˌ)dadˈlʊɨ̯θʊχ/ | |
| 1432 | dadocsigenu | Enw, Berf | /dadˌɔksɪˈɡɛnɨ/ | to deoxygenate. |
| 1433 | dadorchuddio | Enw, Berf | to unveil. | |
| 1434 | dadwreiddio | Berf | /dadˈwrɛɨ̞̯ðjɔ/ | to uproot. |
| 1435 | daearfochyn | Enw | singulative of daearfoch (“badgers”). | |
| 1436 | daearyddiaeth | Enw | /ˌdeɨ̯aˈrəðjaɨ̯θ/ | Equivalent to 'geography': The study of the physical properties of the earth, including how humans affect and are affect… |
| 1437 | dafarnwraig | Enw | /davarnˈwrai̯ɡ/ | soft mutation of tafarnwraig. |
| 1438 | dail bysedd coch(ion) | Enw | ||
| 1439 | dail crwn Cernyw | Enw | ||
| 1440 | dail y fendigaid | Enw | ||
| 1441 | dail y parlys | Enw | palsywort, cowslips (Primula veris). | |
| 1442 | dail yr afu | Enw | liverleaf (Hepatica nobilis syn. Anemone hepatica). | |
| 1443 | dail yr hocys | Enw | /ˌdai̯l ər ˈhɔkɨ̞s/ | marsh mallow (Althaea officinalis). |
| 1444 | daily y pumbys | Enw | ||
| 1445 | dal i lawr | Berf | to keep under, to keep down. | |
| 1446 | daliadaethau | Enw | /ˌdaljaˈdeɨ̯θaɨ̯/ | |
| 1447 | damcaniaeth | Enw | /damˈkanjaɨ̯θ/ | Equivalent to 'theory': A description of an event or system that is considered to be accurate. |
| 1448 | damcaniaethau | Enw | /damkanˈjeɨ̯θaɨ̯/ | |
| 1449 | damcaniaethol | Ansoddair | theoretical. | |
| 1450 | damcaniaethu | Berf | ||
| 1451 | dan aeliau rhywun | Enw | /dan ˌeɨ̯ljaɨ̯ ˈr̥ɪu̯ɨ̞n/ | surreptitious, surreptitiously, without someone's knowledge. |
| 1452 | dan lenni'r nos | Enw | under cover of night, under cover of darkness. | |
| 1453 | dan y don | Enw | /ˌdan ə ˈdɔn/ | under the sea, undersea, underwater. |
| 1454 | dan y rhewbwynt | Enw | /(ˌ)dan ə ˈr̥ɛu̯bʊɨ̯nt/ | below freezing (point), minus (of temperature). |
| 1455 | danadl bach blynyddol | Enw | ||
| 1456 | danadl marw coch | Enw | ||
| 1457 | danadl y cywarch | Enw | ||
| 1458 | danagr coch bochlwyd | Enw | soft mutation of tanagr coch bochlwyd. | |
| 1459 | danagr coch mygydog | Enw | soft mutation of tanagr coch mygydog. | |
| 1460 | danagrod cochion bochlwyd | Enw | soft mutation of tanagrod cochion bochlwyd. | |
| 1461 | danagrod cochion mygydog | Enw | soft mutation of tanagrod cochion mygydog. | |
| 1462 | dant y ci | Enw | dandelion (Taraxacum officinale). | |
| 1463 | dant y llew | Enw | dandelion (Taraxacum officinale). | |
| 1464 | danteithiol | Enw | ||
| 1465 | darbwylliad | Enw | ||
| 1466 | darganfyddiad | Enw | ||
| 1467 | darganfyddwr | Enw | ||
| 1468 | dargludiant | Enw | /darˈɡlɨ̞djant/ | conductance (of electricity, heat, light or sound). |
| 1469 | dargyfeiredd | Enw | divergence, detour. | |
| 1470 | dargyfeiriad | Enw | diversion, detour, redirection. | |
| 1471 | dargyfeirio | Enw | ||
| 1472 | dargyfeiriol | Ansoddair | divergent, diversionary. | |
| 1473 | darlithoedd | Enw | ||
| 1474 | darllediadau | Enw | ||
| 1475 | darllenadwy | Enw | ||
| 1476 | darllenaist | Berf | /darˈɬɛnai̯sd/ | |
| 1477 | darllenfwrdd | Enw | ||
| 1478 | darluniadol | Enw, Ansoddair | pictorial, illustrative, graphic. | |
| 1479 | darmstadtiwm | Enw | /darmˈʃdatjʊm/ | darmstadtium. |
| 1480 | darn o gig | Enw | ||
| 1481 | darostyngiad | Enw | subjugation, subjection. | |
| 1482 | darpariaeth | Enw | /darˈparjaɨ̯θ/ | preparation, provision. |
| 1483 | datblygedig | Enw | ||
| 1484 | datblygiadau | Enw | ||
| 1485 | datblygiadol | Enw, Ansoddair | developmental. | |
| 1486 | datganiadau | Enw | ||
| 1487 | datguddiadau | Enw | ||
| 1488 | datgysylltu | Enw, Berf | to disestablish. | |
| 1489 | dau ar bymtheg | Ansoddair | /ˌdaɨ̯ ar ˈbəmθɛɡ/ | seventeen. |
| 1490 | dau ar hugain | Ansoddair | /ˌdaɨ̯ ar ˈhɪɡai̯n/ | Equivalent to 'twenty-two': A .22 calibre pistol or rifle. |
| 1491 | dau ddeg chwe | Ansoddair | /ˌdaɨ̯ðɛɡ ˈχweː/ | twenty-six (before nouns). |
| 1492 | dau ddeg chwech | Enw, Ansoddair | /ˌdaɨ̯ðɛɡ ˈχweːχ/ | Equivalent to 'twenty-six': The cardinal number immediately following twenty-five and preceding twenty-seven. |
| 1493 | dau ddeg dau | Enw, Ansoddair | /ˌdaɨ̯ðɛɡ ˈdaːɨ̯/ | Equivalent to 'twenty-two': A .22 calibre pistol or rifle. |
| 1494 | dau ddeg dwy | Enw, Ansoddair | /ˌdaɨ̯ðɛɡ ˈduːɨ̯/ | Equivalent to 'twenty-two': A .22 calibre pistol or rifle. |
| 1495 | dau ddeg naw | Enw, Ansoddair | /ˌdaɨ̯ðɛɡ ˈnaːu̯/ | Equivalent to 'twenty-nine': The cardinal number immediately following twenty-eight and preceding thirty. |
| 1496 | dau ddeg pedair | Enw, Ansoddair | /ˌdai̯ðɛɡ ˈpɛdai̯r/ | Equivalent to 'twenty-four': The cardinal number immediately following twenty-three and preceding twenty-five. |
| 1497 | dau ddeg pedwar | Enw, Ansoddair | /ˌdaɨ̯ðɛɡ ˈpɛdwar/ | Equivalent to 'twenty-four': The cardinal number immediately following twenty-three and preceding twenty-five. |
| 1498 | dau ddeg pum | Ansoddair | twenty-five. | |
| 1499 | dau ddeg pump | Enw, Ansoddair | /ˌdaɨ̯ðɛɡ ˈpɨ̞mp/ | Equivalent to 'twenty-five': A solitaire card game with the goal of making a five-by-five square of cards so that every… |
| 1500 | dau ddeg saith | Enw, Ansoddair | /ˌdaɨ̯ðɛɡ ˈsai̯θ/ | Equivalent to 'twenty-seven': The cardinal number immediately following twenty-six and preceding twenty-eight. |
| 1501 | dau ddeg tair | Enw, Ansoddair | /ˌdaɨ̯ðɛɡ ˈtai̯r/ | Equivalent to 'twenty-three': The cardinal number immediately following twenty-two and preceding twenty-four; 23. |
| 1502 | dau ddeg tri | Enw, Ansoddair | /ˌdaɨ̯ðɛɡ ˈtriː/ | Equivalent to 'twenty-three': The cardinal number immediately following twenty-two and preceding twenty-four; 23. |
| 1503 | dau ddeg un | Enw, Ansoddair | /ˌdaɨ̯ðɛɡ ˈɨːn/ | Equivalent to 'twenty-one': A basketball-based game in which players attempt to score exactly twenty-one points. |
| 1504 | dau ddeg wyth | Enw, Ansoddair | /ˌdaɨ̯ðɛɡ ˈuːɨ̯θ/ | Equivalent to 'twenty-eight': The cardinal number immediately following twenty-seven and preceding twenty-nine. |
| 1505 | ddadlwythodd | Berf | /ðadˈlʊɨ̯θɔð/ | soft mutation of dadlwythodd. |
| 1506 | ddamcaniaeth | Enw | soft mutation of damcaniaeth. | |
| 1507 | ddarllenais | Berf | /ðarˈɬɛnai̯s/ | soft mutation of darllenais. |
| 1508 | ddarllenaist | Berf | /ðarˈɬɛnai̯sd/ | soft mutation of darllenaist. |
| 1509 | ddarllenoch | Berf | /ðarˈɬɛnɔχ/ | soft mutation of darllenoch. |
| 1510 | ddarllenodd | Berf | /ðarˈɬɛnɔð/ | soft mutation of darllenodd. |
| 1511 | ddata-basau | Enw | soft mutation of data-basau (“databases”). | |
| 1512 | ddefnyddiwr | Enw | /ðɛvˈnəðjʊr/ | soft mutation of defnyddiwr. |
| 1513 | ddemocrataidd | Ansoddair | /ˌðɛmɔkˈratai̯ð/ | soft mutation of democrataidd. |
| 1514 | ddeuddegfed | Ansoddair | /ðeɨ̯ˈðɛɡvɛd/ | soft mutation of deuddegfed (“twelfth”). |
| 1515 | ddeufed ar hugain | Ansoddair | /ˌðeɨ̯vɛd ar ˈhɪɡai̯n/ | twenty second. |
| 1516 | ddiarhebion | Enw | soft mutation of diarhebion. | |
| 1517 | ddigwyddiad | Enw | /ðɪˈɡʊi̯ðjad/ | soft mutation of digwyddiad. |
| 1518 | ddigwyddiadau | Enw | soft mutation of digwyddiadau. | |
| 1519 | ddigwyddodd | Berf | /ðɪɡˈwɨ̞ðɔð/ | soft mutation of digwyddodd. |
| 1520 | ddim yn ffôl | Enw | ||
| 1521 | ddinas fawr ddrwg | Enw | /ˌðɪnas ˌvau̯r ˈðruːɡ/ | soft mutation of dinas fawr ddrwg. |
| 1522 | ddisgynebau | Enw | /ˌðɪsɡəˈnɛbaɨ̯/ | soft mutation of disgynebau. |
| 1523 | ddisgynedig | Ansoddair | /ˌðɪsɡəˈnɛdɪɡ/ | soft mutation of disgynedig. |
| 1524 | ddiwygiedig | Ansoddair | /ˌði.wɨ̞ɡˈjɛ.diɡ/ | soft mutation of diwygiedig. |
| 1525 | ddiwylliant | Enw | /ðiˈwəɬjant/ | soft mutation of diwylliant. |
| 1526 | ddosbarthau | Enw | /ðɔsˈbarθaɨ̯/ | soft mutation of dosbarthau. |
| 1527 | ddosbarthiad | Enw | soft mutation of dosbarthiad. | |
| 1528 | ddraenogrwydd | Enw | /ðreɨ̯ˈnɔɡ.ruɨ̯ð/ | soft mutation of draenogrwydd. |
| 1529 | ddwyfed ar bymtheg | Ansoddair | /ˌðʊɨ̯vɛd ar ˈbəmθɛɡ/ | seventeenth. |
| 1530 | ddwyfed ar hugain | Ansoddair | /ˌðʊɨ̯vɛd ar ˈhɪɡai̯n/ | feminine singular of ddeufed ar hugain (“twenty second”). |
| 1531 | ddwyieithog | Ansoddair | /ðʊɨ̯ˈjei̯θɔɡ/ | soft mutation of dwyieithog (“bilingual”). |
| 1532 | ddyfalbarhad y saint | Enw | /ˌðəvalbarˌhaːd ə ˈsai̯nt/ | soft mutation of dyfalbarhad y saint. |
| 1533 | ddyfeiswraig | Enw | soft mutation of dyfeiswraig. | |
| 1534 | ddynoliaeth | Enw | /ðəˈnɔljaɨ̯θ/ | soft mutation of dynoliaeth. |
| 1535 | ddyrchafedig | Ansoddair | /ðərχaˈvɛdɪɡ/ | soft mutation of dyrchafedig. |
| 1536 | ddyrneidiau | Enw | soft mutation of dyrneidiau. | |
| 1537 | de-ddwyrain | Enw | /ˌdeːˈðʊɨ̯rain/ | Equivalent to 'Southeast': The intercardinal compass point halfway between east and south; specifically at a bearing of… |
| 1538 | de-orllewin | Enw | /ˌdeː.ɔrˈɬɛu̯ɪn/ | Equivalent to 'Southwest': The intercardinal compass point halfway between south and west; specifically at a bearing of… |
| 1539 | dealltwriaeth | Enw | /ˌdɛ.aɬˈdʊrjaɨ̯θ/ | intelligence, understanding, intellect. |
| 1540 | deallusrwydd | Enw | intelligence. | |
| 1541 | dechnegyddion | Enw | soft mutation of technegyddion. | |
| 1542 | deddf a threfn | Enw | Equivalent to 'law and order': The principles under which the world and its components operate. | |
| 1543 | deddflyfrau | Enw | ||
| 1544 | deddfwriaeth | Enw | legislation. | |
| 1545 | defnydd-deb | Enw | /dɛvˈnəðdɛb/ | utility (the ability of a commodity to satisfy needs or wants). |
| 1546 | defnyddioldeb | Enw | /ˌdɛvnəðˈjɔldɛb/ | Equivalent to 'utility': The state or condition of being useful; usefulness. |
| 1547 | deg a deugain | Enw | ||
| 1548 | deg a thrigain | Ansoddair | /ˌdeːɡ a ˈθrɪɡai̯n/ | |
| 1549 | deg ar hugain | Ansoddair | /ˌdeːɡ ar ˈhɪɡai̯n/ | Equivalent to 'thirty': A commercial lasting 30 seconds. |
| 1550 | degfed a thrigain | Ansoddair | seventieth. | |
| 1551 | degfed ar hugain | Ansoddair | /ˌdɛɡvɛd ar ˈhɪɡai̯n/ | thirtieth. |
| 1552 | degolyn cod deuaidd | Enw | ||
| 1553 | deiliadaeth | Enw | /dei̯lˈjadaɨ̯θ/ | occupancy. |
| 1554 | deiliadaethau | Enw | /ˌdei̯ljaˈdeɨ̯θaɨ̯/ | |
| 1555 | deiliogrwydd | Enw | ||
| 1556 | deinameitio | Enw | ||
| 1557 | deintyddiaeth | Enw | /dei̯nˈtəðjaɨ̯θ/ | dentistry. |
| 1558 | delfrydiaeth | Enw | ||
| 1559 | deliwr da byw | Enw | ||
| 1560 | delor cnau Algeria | Enw | Kabylie nuthatch (Sitta ledanti). | |
| 1561 | delor cnau Corsica | Enw | Corsican nuthatch (Sitta whiteheadii). | |
| 1562 | delor cnau Tsieina | Enw | Chinese nuthatch (Sitta villosa). | |
| 1563 | delor y cnau | Enw | /ˌdɛlɔr ə ˈknaɨ̯/ | |
| 1564 | delor y coed | Enw | ||
| 1565 | delor y derw | Enw | ||
| 1566 | democrataidd | Enw, Ansoddair | /ˌdɛmɔkˈratai̯ð/ | democratic. |
| 1567 | democratiaeth | Enw | Equivalent to 'democracy': Rule by the people, especially as a form of government; either directly or through elected re… | |
| 1568 | derbynfeydd | Enw | ||
| 1569 | derbynyddion | Enw | ||
| 1570 | derwyddiaeth | Enw | /dɛrˈwəðjaɨ̯θ/ | Equivalent to 'druidism': The religion and philosophical beliefs promoting harmony with nature, and drawing on the pract… |
| 1571 | deuddeg ar hugain | Ansoddair | /ˈdeɨ̯ðɛɡ ar ˈhɪɡai̯n/ | thirty-two. |
| 1572 | deuddegfed ar hugain | Ansoddair | thirty-first. | |
| 1573 | deuddeng ar hugain | Ansoddair | (Ansoddair). | |
| 1574 | deudroediog | Enw | ||
| 1575 | deufed ar bymtheg | Ansoddair | /ˌdeɨ̯vɛd ar ˈbəmθɛɡ/ | seventeenth. |
| 1576 | deufed ar hugain | Ansoddair | /ˌdeɨ̯vɛd ar ˈhɪɡai̯n/ | twenty-second. |
| 1577 | deugain a dau | Enw | ||
| 1578 | deugain a dwy | Enw | ||
| 1579 | deugain a naw | Ansoddair | forty nine. | |
| 1580 | deugain a phedair | Enw | ||
| 1581 | deugain a phedwar | Enw | ||
| 1582 | deugain a saith | Enw | ||
| 1583 | deugain a tair | Enw | ||
| 1584 | deugain a tri | Enw | ||
| 1585 | deugain ac ail | Ansoddair | forty-second. | |
| 1586 | deugain ac un | Enw, Ansoddair | forty-one. | |
| 1587 | deugain ac unfed | Ansoddair | forty-first. | |
| 1588 | deugain ac wyth | Enw, Ansoddair | forty-eight. | |
| 1589 | deugain ac wythfed | Ansoddair | forty-eighth. | |
| 1590 | deunaw a thrigain | Ansoddair | thirty-eight. | |
| 1591 | deunaw ar hugain | Ansoddair | thirty-eight. | |
| 1592 | deunawfed a thrigain | Ansoddair | thirty-eighth. | |
| 1593 | deunawfed ar hugain | Ansoddair | thirty-eighth. | |
| 1594 | deuod allyrru golau | Enw | light-emitting diode, LED. | |
| 1595 | deurywiaeth | Enw | /deɨ̯ˈrɪu̯jaɨ̯θ/ | hermaphroditism. |
| 1596 | deurywioldeb | Enw | ||
| 1597 | dewis a dethol | Enw | ||
| 1598 | deyrn gwinau bach | Enw | soft mutation of teyrn gwinau bach. | |
| 1599 | deyrn gwinau mawr | Enw | soft mutation of teyrn gwinau mawr. | |
| 1600 | deyrniaid gwinau bach | Enw | soft mutation of teyrniaid gwinau bach. | |
| 1601 | deyrniaid gwinau mawr | Enw | soft mutation of teyrniaid gwinau mawr. | |
| 1602 | di-ben-draw | Ansoddair | /dɪbɛnˈdrau̯/ | endless, unending, interminable. |
| 1603 | di-ddeuaidd | Enw, Ansoddair | non-binary (outside the gender binary). | |
| 1604 | diaconiaeth | Enw | ||
| 1605 | diadelloedd | Enw | ||
| 1606 | dianghenraid | Enw, Ansoddair | /ˌdiːaŋˈhɛnrai̯d/ | inessential, unnecessary. |
| 1607 | dianrhydedd | Enw | ||
| 1608 | dianrhydeddu | Enw | ||
| 1609 | dianrhydeddus | Enw | ||
| 1610 | diboblogaeth | Enw | Equivalent to 'Depopulation': The act of depopulating or condition of being depopulated; the destruction or expulsion of… | |
| 1611 | dibyn-dobyn | Ansoddair | /ˌdɪbɨ̞nˈdɔbɨ̞n/ | topsy-turvy, head over heels, upside down. |
| 1612 | dichellgarwch | Enw | ||
| 1613 | dichonoldeb | Enw | ||
| 1614 | diddiwylliant | Enw, Ansoddair | uncultured, uncivilised. | |
| 1615 | didduwiaeth | Enw | ||
| 1616 | diddwythiad | Enw | deduction (derivation of a specific conclusion from specified premises). | |
| 1617 | diffeithdir | Enw | /dɪˈfei̯θdɪr/ | Equivalent to 'Waste': Excess of material, useless by-products, or damaged, unsaleable products; garbage; rubbish. |
| 1618 | diffeithiad | Enw | ||
| 1619 | diffeithiol | Enw | ||
| 1620 | diffeithwch | Enw | /dɪˈfei̯θʊχ/ | desert wilderness, wasteland, desolation. |
| 1621 | diffenestru | Enw | ||
| 1622 | diffreithiant | Enw | /dɪˈfrei̯θjant/ | Equivalent to 'Diffraction': The bending of a wave around an obstacle. |
| 1623 | diffreithio | Berf | /dɪˈfrei̯θjɔ/ | to diffract. |
| 1624 | diffrwythder | Enw | ||
| 1625 | diflaniadau | Enw | ||
| 1626 | diflasrwydd | Enw | ||
| 1627 | difrifoldeb | Enw | ||
| 1628 | digartrefedd | Enw | homelessness. | |
| 1629 | digideiddio | Enw, Berf | /dɪɡɪˈdei̯ðjɔ/ | to digitize. |
| 1630 | dignewyllyn | Enw, Ansoddair | kernelless, without a kernel. | |
| 1631 | digollediad | Enw | ||
| 1632 | digon o sioe | Enw | ||
| 1633 | digwyddiadau | Enw | ||
| 1634 | digwyddiadol | Enw | ||
| 1635 | digwyddlawn | Enw | ||
| 1636 | digyfeiriad | Enw | ||
| 1637 | dilyffethair | Ansoddair | unfettered, unchecked, unencumbered. | |
| 1638 | dilywodraeth | Enw, Ansoddair | /dɪləu̯ˈɔdraɨ̯θ/ | without governance, ungoverned, uncontrolled. |
| 1639 | dim blotyn gwaeth | Enw | ||
| 1640 | dim o beth | Ansoddair | nipper, kid, small child, pipsqueak. | |
| 1641 | din dros ben | Enw | ||
| 1642 | dinas fawr ddrwg | Enw | /ˌdɪnas ˌvau̯r ˈðruːɡ/ | A large city viewed from its negative aspects, usually Cardiff, the capital city of Wales. |
| 1643 | dinasfraint | Enw | citizenship, freedom of a city. | |
| 1644 | diniweidrwydd | Enw | ||
| 1645 | diod-offrwm | Enw | ||
| 1646 | dioddefaint | Enw | Equivalent to 'suffering': The condition of someone who suffers; a state of pain or distress. | |
| 1647 | diolch yn fawr | Enw, Ymadrodd | /ˌdiɔlχ ən ˈvau̯r/ | thank you very much. |
| 1648 | diolchgarwch | Enw | /dɪɔlχˈɡarʊχ/ | thankfulness. |
| 1649 | diplomyddol | Enw | ||
| 1650 | diraddiadwy | Enw | ||
| 1651 | diraddiedig | Enw | ||
| 1652 | dirwestaidd | Enw | ||
| 1653 | dirwyn i ben | Enw, Berf | to bring to an end, to wind up, to finish. | |
| 1654 | disbyddedig | Enw | ||
| 1655 | disg caled allanol | Enw | ||
| 1656 | disg hyblyg bychain | Enw | ||
| 1657 | disgleirdeb | Enw | brilliance, brightness. | |
| 1658 | disgraffiad | Enw | ||
| 1659 | disgrifiadau | Enw | ||
| 1660 | disgrifiadol | Enw, Ansoddair | illustrative, descriptive. | |
| 1661 | disgwyliedig | Enw | ||
| 1662 | disgyblaeth | Enw | /dɪsˈɡəblaɨ̯θ/ | discipleship. |
| 1663 | disgyblaethol | Ansoddair | /ˌdɪsɡəbˈleɨ̯θɔl/ | disciplinary. |
| 1664 | disgynyddion | Enw | ||
| 1665 | disgyrchedd | Enw | /dɪsˈɡərχɛð/ | Equivalent to 'Gravitation': The fundamental force of attraction which exists between all matter in the universe that te… |
| 1666 | disgyrchiad | Enw | ||
| 1667 | disgyrchiant | Enw | /dɪsˈɡərχjant/ | Equivalent to 'Gravitation': The fundamental force of attraction which exists between all matter in the universe that te… |
| 1668 | disgyrchiol | Enw | ||
| 1669 | distawrwydd | Enw | /dɪsˈdau̯rʊɨ̯ð/ | Equivalent to 'silence': A female given name from English. |
| 1670 | diswyddedig | Enw | ||
| 1671 | ditw copog cyffredin | Enw | soft mutation of titw copog cyffredin. | |
| 1672 | ditwod copog cyffredin | Enw | soft mutation of titwod copog cyffredin. | |
| 1673 | diweddarach | Ansoddair | /ˌdɪu̯.ɛˈðaraχ/ | comparative degree of diweddar. |
| 1674 | diwinyddiaeth | Enw | Equivalent to 'theology': The study of God, a god, or gods; and of the truthfulness of religion in general. | |
| 1675 | diwydiannol | Ansoddair | industrial. | |
| 1676 | diwylliannau | Enw | ||
| 1677 | diwylliannol | Enw, Ansoddair | Equivalent to 'cultural': Of or relating to culture or cultivation. | |
| 1678 | diwylliedig | Enw, Ansoddair | /dɪu̯əɬˈjɛdɪɡ/ | cultured, refined. |
| 1679 | diymadferth | Enw | ||
| 1680 | diystyrllyd | Enw, Ansoddair | /diːəsˈdərɬɨ̞d/ | contemptuous, disdainful. |
| 1681 | dod ar ôl | Berf | to come after, to follow. | |
| 1682 | dod i ben | Enw, Berf | to come to a head, to be fulfilled. | |
| 1683 | dod i fod | Enw, Berf | /ˌdoːd i ˈvoːd/ | to come to be. |
| 1684 | dod i lawr | Berf | to come down, to descend. | |
| 1685 | dod i mewn | Berf | to come in, to enter. | |
| 1686 | dod o hyd | Enw, Berf | Equivalent to 'find': Anything that is found (usually valuable), as objects on an archeological site or a person with ta… | |
| 1687 | dod yn ddarnau | Berf | to go to pieces, to come apart. | |
| 1688 | dod yn ôl | Berf | to come back, to return. | |
| 1689 | dod yn rhydd | Berf | to come undone. | |
| 1690 | does dim dwywaith | Ymadrodd | no two ways about it. | |
| 1691 | doetheiriau | Enw | ||
| 1692 | dogfennaeth | Enw | Equivalent to 'documentation': Something transposed from a thought to a document; the written account of an idea. | |
| 1693 | dolffiniaid | Enw | /dɔlˈfɪnjai̯d/ | |
| 1694 | dosbarthiad | Enw | /dɔsˈbarθjad/ | Equivalent to 'classification': The act of forming into a class or classes; a distribution into groups, as classes, orde… |
| 1695 | dosbarthiadau | Enw | /dɔsbarθˈjadaɨ̯/ | |
| 1696 | dosbarthwyr | Enw | /dɔsˈbarθwɨ̞r/ | |
| 1697 | draenog y môr | Enw | Equivalent to 'sea bass': Any of various species of saltwater fish in various families, or a specimen thereof, in severa… | |
| 1698 | draenogiaid | Enw | ||
| 1699 | draenogiaid y môr | Enw | ||
| 1700 | draenogrwydd | Enw | /dreɨ̯ˈnɔɡ.ruɨ̯ð/ | acrimonious nature, peevish spirit, prickliness, hedgehogginess. |
| 1701 | draenogyn dŵr croyw | Enw | Equivalent to 'European perch': A freshwater fish of species Perca fluviatilis in the family Percidae, native to norther… | |
| 1702 | drain y camel | Enw | ||
| 1703 | drain y geifr | Enw | ||
| 1704 | drain yr afr | Enw | ||
| 1705 | drain yr Aifft | Enw | ||
| 1706 | draw fan hyn | Adferf | /ˌdrau̯ van ˈhɨ̞n/ | over here. |
| 1707 | drifl y gwynt | Enw | Equivalent to 'Gossamer': A fine film made up of cobwebs, seen floating in the air or caught on bushes, etc. | |
| 1708 | drifl yr ŷd | Enw | ||
| 1709 | dringedyddion | Enw | ||
| 1710 | dringhedydd | Enw | Equivalent to 'Creeper': A person or a thing that crawls or creeps. | |
| 1711 | dros ben llestri | Enw | ||
| 1712 | drosglwyddiad | Enw | ||
| 1713 | drosodd a throsodd | Enw | over and over, again and again. | |
| 1714 | drwgdeimlad | Enw | /drʊɡˈdei̯mlad/ | resentment, ill will. |
| 1715 | drwgewyllys | Enw | ||
| 1716 | drwgweithred | Enw | ||
| 1717 | drychiolaeth | Enw | /drəχˈjɔlaɨ̯θ/ | apparition, phantom, ghost, spectre. |
| 1718 | dryw morgrug adeinblaen | Enw | ||
| 1719 | dryw morgrug adeinfrith | Enw | ||
| 1720 | dryw morgrug adeingoch | Enw | ||
| 1721 | dryw morgrug aelwyn | Enw | ||
| 1722 | dryw morgrug brith | Enw | ||
| 1723 | dryw morgrug bronddu | Enw | ||
| 1724 | dryw morgrug bronfelyn | Enw | ||
| 1725 | dryw morgrug bychan | Enw | ||
| 1726 | dryw morgrug cain | Enw | ||
| 1727 | dryw morgrug cefngoch | Enw | ||
| 1728 | dryw morgrug cefnsmotiog | Enw | ||
| 1729 | dryw morgrug Cherrie | Enw | ||
| 1730 | dryw morgrug cycyllog | Enw | ||
| 1731 | dryw morgrug cynffonfrith | Enw | ||
| 1732 | dryw morgrug cynffonrhesog | Enw | ||
| 1733 | dryw morgrug cynffonwinau | Enw | ||
| 1734 | dryw morgrug gyddf-felyn | Enw | yellow-throated antwren (Myrmotherula ambigua). | |
| 1735 | dryw morgrug gyddf-frith | Enw | ||
| 1736 | dryw morgrug gyddfblaen | Enw | ||
| 1737 | dryw morgrug gyddfserog | Enw | ||
| 1738 | dryw morgrug gyddfsiecrog | Enw | ||
| 1739 | dryw morgrug hiradain | Enw | ||
| 1740 | dryw morgrug Ihering | Enw | ||
| 1741 | dryw morgrug Klages | Enw | ||
| 1742 | dryw morgrug llwyd | Enw | ||
| 1743 | dryw morgrug llwydaidd | Enw | ||
| 1744 | dryw morgrug llwytu | Enw | ||
| 1745 | dryw morgrug llygadwyn | Enw | ||
| 1746 | dryw morgrug penddu | Enw | ||
| 1747 | dryw morgrug penrhesog | Enw | ||
| 1748 | dryw morgrug pigfain | Enw | ||
| 1749 | dryw morgrug pigfawr | Enw | ||
| 1750 | dryw morgrug pigfyr | Enw | ||
| 1751 | dryw morgrug Roraima | Enw | ||
| 1752 | dryw morgrug Salvadori | Enw | ||
| 1753 | dryw morgrug Sclater | Enw | ||
| 1754 | dryw morgrug Serra | Enw | ||
| 1755 | dryw morgrug Swrinam | Enw | ||
| 1756 | dryw morgrug tinfelyn | Enw | ||
| 1757 | dryw morgrug tingoch | Enw | ||
| 1758 | dryw morgrug Todd | Enw | ||
| 1759 | dryw morgrug torddu | Enw | ||
| 1760 | dryw morgrug torfrown | Enw | ||
| 1761 | dryw morgrug torgoch | Enw | ||
| 1762 | dryw morgrug tororen | Enw | orange-bellied antwren, Sick's antwren (Terenura sicki). | |
| 1763 | dryw morgrug torwyn | Enw | ||
| 1764 | dryw morgrug tywyll | Enw | ||
| 1765 | dryw morgrug unlliw | Enw | ||
| 1766 | dryw morgrug ysgwyddwinau | Enw | ||
| 1767 | dryw morgrug ystlyswyn | Enw | ||
| 1768 | dryw prysgoed aelwyn | Enw | ||
| 1769 | dryw prysgoed Arfak | Enw | ||
| 1770 | dryw prysgoed Atherton | Enw | ||
| 1771 | dryw prysgoed clustlwyd | Enw | ||
| 1772 | dryw prysgoed gyddf-felyn | Enw | yellow-throated scrubwren (Neosericornis citreogularis, formerly Sericornis citreogularis). | |
| 1773 | dryw prysgoed gyddfgoch | Enw | ||
| 1774 | dryw prysgoed llwydwyrdd | Enw | ||
| 1775 | dryw prysgoed mannog | Enw | ||
| 1776 | dryw prysgoed mawr | Enw | ||
| 1777 | dryw prysgoed Papwa | Enw | Papuan scrubwren (Aethomyias papuensis, formerly Sericornis papuensis). | |
| 1778 | dryw prysgoed pigfawr | Enw | ||
| 1779 | dryw prysgoed pigwelw | Enw | ||
| 1780 | dryw prysgoed Tasmania | Enw | ||
| 1781 | dryw prysgoed trofannol | Enw | ||
| 1782 | dryw prysgoed wynebwyn | Enw | ||
| 1783 | drywbreblyn bron gennog | Enw | ||
| 1784 | du a gwyn | Enw, Ansoddair | /ˌdɨː a ˈɡwɨ̞n/ | Equivalent to 'piebald': An animal with piebald coloration. |
| 1785 | duegredyn y muriau | Enw | wall-rue (Asplenium ruta-muraria). | |
| 1786 | dull enwi binomaidd | Enw | ||
| 1787 | duwiolfrydig | Enw | ||
| 1788 | dw i'n iawn | Ymadrodd | /du in jaun/ | Equivalent to 'I'm fine': Conventional response to "how are you?", indicating that one is well. |
| 1789 | dw i'n meddwl | Ymadrodd | /du iːn mɛðʊl/ | Equivalent to 'I think so': I believe that is the case, but am not certain. |
| 1790 | dwbl-glicio | Enw | ||
| 1791 | dweud y drefn | Berf | to tell off, to scold. | |
| 1792 | dŵr lled hallt | Enw | ||
| 1793 | dŵr y môr | Enw | Equivalent to 'seawater': The saltwater of a sea or ocean. | |
| 1794 | dwsin a hanner | Enw | ||
| 1795 | dwy ar bymtheg | Enw, Ansoddair | /ˌduːɨ̯ ar ˈbəmθɛɡ/ | (Ansoddair). |
| 1796 | dwy ar hugain | Ansoddair | /ˌduːɨ̯ ar ˈhɪɡai̯n/ | (Ansoddair). |
| 1797 | dwyadeiniog | Enw | ||
| 1798 | dwyarbymtheg | Ansoddair | /ˌduːɨ̯ ar ˈbəmθɛɡ/ | alternative spelling of dwy ar bymtheg (“seventeen”). |
| 1799 | dwyarbymtheg a deugain | Ansoddair | /ˌduːɨ̯ ar ˈbəmθɛɡ a ˈdei̯ɡai̯n/ | (Ansoddair). |
| 1800 | dwyfed ar bymtheg | Ansoddair | (Ansoddair). | |
| 1801 | dwyfed ar hugain | Ansoddair | (Ansoddair). | |
| 1802 | dwygeinioglys | Enw | /ˌdʊɨ̯ɡei̯nˈjɔɡlɨ̞s/ | herb twopence, moneywort (Lysimachia nummularia). |
| 1803 | dwylo i fyny | Enw | Equivalent to 'hands up': third-person singular simple present indicative of hand up. | |
| 1804 | dwyn i ben | Enw, Berf | to bring about, to bring to pass. | |
| 1805 | dwyn i gof | Enw | ||
| 1806 | dwyn yn ôl | Berf | to bring back, to return. | |
| 1807 | dwysgyfalafol | Enw | ||
| 1808 | dychmygadwy | Enw, Ansoddair | /dəχməˈɡadʊɨ̯/ | imaginable, conceivable. |
| 1809 | dychmygedig | Enw | ||
| 1810 | dychryniadau | Enw | /ˌdəχrənˈjadaɨ̯/ | |
| 1811 | dychrynllyd | Enw, Ansoddair | /dəχˈrənɬɨ̞d/ | frightful, terrifying, dreadful. |
| 1812 | dydd Mawrth Ynyd | Enw | Equivalent to 'Shrove Tuesday': The day before the beginning of Lent on Ash Wednesday. | |
| 1813 | dyddiaduron | Enw | ||
| 1814 | dyfalbarhad | Enw | /ˌdəvalbarˈhaːd/ | diligence, assiduousness, dedication. |
| 1815 | dyfalbarhad y saint | Enw | perseverance of the saints. | |
| 1816 | dyfarniadau | Enw | /ˌdəvarnˈjadaɨ̯/ | |
| 1817 | dyfeiswragedd | Enw | /ˌdəvei̯sˈwraɡɛð/ | |
| 1818 | dyfeiswraig | Enw | /dəˈvei̯swrai̯ɡ/ | female inventor. |
| 1819 | dyffrynnoedd | Enw | ||
| 1820 | dyframaethu | Enw, Berf | to aquafarm. | |
| 1821 | dyfrllys dail aflym | Enw | ||
| 1822 | dyfrllys dail gloyw | Enw | ||
| 1823 | dyfrllys dail helyg | Enw | ||
| 1824 | dyfrllys dail llym(ion) | Enw | ||
| 1825 | dyfrllys y fignen | Enw | ||
| 1826 | dyfrllys y gors | Enw | ||
| 1827 | dyfrllys yr Ynysoedd | Enw | ||
| 1828 | dygwyl Fair ddiwethaf | Enw | ||
| 1829 | dygwyl Fair gyhydedd | Enw | ||
| 1830 | dygwyl Fair gyntaf | Enw | ||
| 1831 | dygwyl Fair Magdalen | Enw | ||
| 1832 | dymchweliad | Enw | Equivalent to 'Demolition': The process of demolishing or destroying buildings or other structures. | |
| 1833 | dynleiddiad | Enw | /ˌdɨːnˈlei̯ðjad/ | Equivalent to 'manslaughterer': Someone who commits manslaughter. |
| 1834 | dynleiddiaid | Enw | /ˌdɨːnˈlei̯ðjai̯d/ | |
| 1835 | dyrchafedig | Enw, Ansoddair | /dərχaˈvɛdɪɡ/ | promoted (to a higher position). |
| 1836 | dyrru i fwrdd | Enw | ||
| 1837 | dyrysleoedd | Enw | /ˌdərəsˈleː.ɔɨ̯ð/ | |
| 1838 | dysgleidiau | Enw | /dɨ̞sɡˈlei̯djaɨ̯/ | |
| 1839 | dyweddïadau | Enw | ||
| 1840 | ebargofiant | Enw | /ˌɛbarˈɡɔvjant/ | Equivalent to 'oblivion': The state of forgetting completely, of being oblivious, unconscious, unaware, as when sleeping… |
| 1841 | ebolgarn y gerddi | Enw | asarabacca (Asarum europaeum). | |
| 1842 | ebolgarn y môr | Enw | sea bindweed (Calystegia soldanella). | |
| 1843 | ebolgarn y tywod | Enw | sea bindweed (Calystegia soldanella). | |
| 1844 | echreiddiad | Enw | eccentricity. | |
| 1845 | echryshaint | Enw | /ɛχˈrəsai̯nt/ | pestilence, plague, (contagious) disease. |
| 1846 | echryslonedd | Enw | ||
| 1847 | ecogyfeillgar | Ansoddair | /ˌɛkɔɡəˈvei̯ɬɡar/ | eco-friendly, environmentally friendly. |
| 1848 | economegwyr | Enw | /ˌɛkɔnɔˈmɛɡwɨ̞r/ | |
| 1849 | economegydd | Enw | /ˌɛkɔnɔˈmɛɡɨ̞ð/ | Equivalent to 'Economist': An expert in economics, especially one who studies economic data and extracts higher-level in… |
| 1850 | edafeddog y gors | Enw | marsh cudweed (Gnaphalium uliginosum). | |
| 1851 | edrych ar ôl | Enw, Berf | to look after, to care for, to mind. | |
| 1852 | efengylaidd | Enw, Ansoddair | evangelical. | |
| 1853 | efengyleiddio | Enw | ||
| 1854 | effaith tŷ gwydr | Enw | Equivalent to 'greenhouse effect': The process by which a planet is heated by solar radiation which is retained by its a… | |
| 1855 | eginblanhigyn | Enw | Equivalent to 'Seedling': A young plant grown from seed. | |
| 1856 | egwyddorion | Enw | ||
| 1857 | egyllt y coed | Enw | ||
| 1858 | egyllt y dŵr | Enw | ||
| 1859 | egyllt yr ŷd | Enw | ||
| 1860 | ehedydd copog Sykes | Enw | ||
| 1861 | ehedydd pig binc | Enw | ||
| 1862 | Ei Brytanaidd Fawrhydi | Rhagenw | Her Brittanic Majesty. | |
| 1863 | Ei Fawrhydi Brenhinol | Rhagenw | Equivalent to 'His Royal Majesty': A title of respect used when referring to a king. | |
| 1864 | Ei Fawrhydi Ymerodrol | Rhagenw | His Imperial Majesty. | |
| 1865 | Ei Frytanaidd Fawrhydi | Rhagenw | His Brittanic Majesty. | |
| 1866 | Ei Huchelder Brenhinol | Rhagenw | Equivalent to 'Her Royal Highness': A title given to certain female members of a royal family, abbreviated HRH. | |
| 1867 | Ei Huchelder Ymerodrol | Rhagenw | Her Imperial Highness. | |
| 1868 | Ei Mawrhydi Brenhinol | Rhagenw | Equivalent to 'Her Royal Majesty': A title of respect used when referring to a queen. | |
| 1869 | Ei Mawrhydi Ymerodrol | Rhagenw | Her Imperial Majesty. | |
| 1870 | Ei Uchelder Brenhinol | Rhagenw | Equivalent to 'His Royal Highness': A title given to certain male members of a royal family, abbreviated HRH. | |
| 1871 | Ei Uchelder Ymerodrol | Rhagenw | His Imperial Highness. | |
| 1872 | Eich Brytanaidd Fawrhydi | Rhagenw | Your Brittanic Majesties. | |
| 1873 | Eich Mawrhydi Brenhinol | Rhagenw | Your Royal Majesties. | |
| 1874 | Eich Mawrhydi Ymerodrol | Rhagenw | Your Imperial Majesties. | |
| 1875 | Eich Uchelder Brenhinol | Rhagenw | Your Royal Highnesses. | |
| 1876 | Eich Uchelder Ymerodrol | Rhagenw | Your Imperial Highnesses. | |
| 1877 | eiddewddail | Enw, Ansoddair | ivy-leaved, having leaves like ivy. | |
| 1878 | eiddilddail | Ansoddair | small-leaved, having small leaves. | |
| 1879 | eilfed ar bymtheg | Ansoddair | /ˌei̯lvɛd ar ˈbəmθɛɡ/ | seventeenth. |
| 1880 | eilun-berllys | Enw | ||
| 1881 | eilunaddolgar | Enw, Ansoddair | /ˌei̯lɨ̞naˈðɔlɡar/ | idolatrous. |
| 1882 | eilunberllys | Enw | ||
| 1883 | einsteiniwm | Enw | /ei̯nˈsdei̯njʊm/ | Equivalent to 'Einsteinium': A transuranic chemical element (symbol Es) with atomic number 99: a soft, silvery, paramagn… |
| 1884 | eiriadurwyr | Enw | /ˌei̯rjaˈdɨ̞rwɨ̞r/ | soft mutation of geiriadurwyr. |
| 1885 | eirin bach tagu | Enw | ||
| 1886 | eirin duon bach | Enw | Equivalent to 'Sloe': The small, astringent, wild fruit of the blackthorn (Prunus spinosa). | |
| 1887 | eirin duon hirion | Enw | ||
| 1888 | eirin duon tag | Enw | ||
| 1889 | eirin sur bach | Enw | ||
| 1890 | eirin y meirch | Enw | ||
| 1891 | eirin y moch | Enw | hawthorn berries, haws, the fruit of hawthorn plants (Crataegus). | |
| 1892 | eirlys y Cawcasws | Enw | ||
| 1893 | eirlys yr hydref | Enw | ||
| 1894 | eistedd i fyny | Enw, Berf | Equivalent to 'sit up': Alternative spelling of sit-up. | |
| 1895 | eistedd i lawr | Enw, Berf | to sit down. | |
| 1896 | eisteddfodau | Enw | /ˌei̯sdɛðˈvɔdaɨ̯/ | |
| 1897 | eisteddfodwr | Enw | /ˌei̯sdɛðˈvɔdʊr/ | eisteddfodwr, one who frequents eisteddfodau, especially as a competitor. |
| 1898 | eisteddfodwyr | Enw | /ˌei̯sdɛðˈvɔdʊɨ̯r/ | |
| 1899 | eisteddfota | Berf | /ˌei̯sdɛðˈvɔta/ | to compete regularly at eisteddfods. |
| 1900 | eisteddleoedd | Enw | ||
| 1901 | eithafrwydd | Enw | ||
| 1902 | eithin y cwrw | Enw | juniper (Juniperus). | |
| 1903 | eliffantaidd | Enw, Ansoddair | Equivalent to 'Elephantine': Any member of the subfamily Elephantinae of elephants and their extinct close relatives. | |
| 1904 | elor-gerbyd | Enw | /ˌɛlɔrˈɡɛrbɨ̞d/ | hearse (vehicle for transporting the dead). |
| 1905 | elusengarwch | Enw | charitableness, benevolence. | |
| 1906 | emyniaduron | Enw | ||
| 1907 | eneidioldeb | Enw | ||
| 1908 | enghreifftiau | Enw | ||
| 1909 | enghreifftiol | Ansoddair | exemplary, illustrative (serving as an example or illustration). | |
| 1910 | ennill yn ôl | Enw, Berf | to get back, to regain. | |
| 1911 | epistemoleg | Enw | Equivalent to 'epistemology': The branch of philosophy dealing with the study of knowledge; the theory of knowledge, ask… | |
| 1912 | er cof am | Enw | ||
| 1913 | erchyllrwydd | Enw | ||
| 1914 | erfin y coed | Enw | black bryony (Dioscorea communis, syn. Tamus communis). | |
| 1915 | erfin yr ŷd | Enw | ||
| 1916 | erledigaeth | Enw | ||
| 1917 | ers cyn cof | Enw | ||
| 1918 | erwain dail llwyfen | Enw | ||
| 1919 | eryr cribog Papwa | Enw | Papuan eagle, New Guinea harpy eagle (Harpyopsis novaeguineae). | |
| 1920 | eryr nadroedd copog | Enw | ||
| 1921 | esblygiadol | Enw, Ansoddair | evolutionary. | |
| 1922 | esgaladuron | Enw | ||
| 1923 | esgeulustod | Enw | ||
| 1924 | ethnigrwydd | Enw | ||
| 1925 | etholaethau | Enw | ||
| 1926 | etholedigaeth | Enw | /ɛθɔlɛˈdɪɡaɨ̯θ/ | the elect (those predestined for salvation). |
| 1927 | etholedigion | Enw, Ansoddair | /ɛθɔlɛˈdɪɡjɔn/ | the elect (those predestined for salvation). |
| 1928 | etholfraint | Enw | franchise; the right to vote. | |
| 1929 | etholfreinio | Enw, Berf | to enfranchise (to endow with the right to vote). | |
| 1930 | ethyl-lithiwm | Enw | ||
| 1931 | eto ac eto | Adferf | again and again. | |
| 1932 | eto i gyd | Enw | ||
| 1933 | Eu Huchelder Brenhinol | Rhagenw | Their Royal Highnesses. | |
| 1934 | ewinedd y gath | Enw | ||
| 1935 | ewyllysgarwch | Enw | ||
| 1936 | faint o'r gloch | Adferf, Rhagenw | /ˌvai̯nt oːr ˈɡloːχ/ | what time?. |
| 1937 | fel a'r fal | Enw | so-and-so. | |
| 1938 | fel piso mochyn | Enw, Ymadrodd | ||
| 1939 | fel'na mae hi | Ymadrodd | that's life, such is life. | |
| 1940 | ferfain yr Ariannin | Enw | ||
| 1941 | fertebratau | Enw | ||
| 1942 | fertebratiaid | Enw | ||
| 1943 | fertigoledd | Enw | verticality. | |
| 1944 | fewngofnodaf | Berf | soft mutation of mewngofnodaf. | |
| 1945 | fewngofnodi | Berf | soft mutation of mewngofnodi. | |
| 1946 | ffacbys y coed | Enw | wood vetch (Vicia sylvatica). | |
| 1947 | ffactorio i mewn | Enw, Berf | to factor in, to take into account. | |
| 1948 | ffagocytosis | Enw | phagocytosis. | |
| 1949 | ffenigl Elen Lluydog | Enw | ||
| 1950 | ffenigl y cŵn | Enw | ||
| 1951 | ffenigl y moch | Enw | hog's fennel, sulphurweed (Peucedanum officinale). | |
| 1952 | ffenigl y môr | Enw | Equivalent to 'rock samphire': Crithmum maritimum (sea fennel), native to temperate seacoasts of Europe. | |
| 1953 | ffieidd-dod | Enw | ||
| 1954 | ffieidd-dra | Enw | ||
| 1955 | ffieiddbeth | Enw | Equivalent to 'abomination': An abominable act; a disgusting vice; a despicable habit. | |
| 1956 | ffigysbrennau | Enw | ||
| 1957 | ffigyswydden | Enw | ||
| 1958 | ffiol y ffridd | Enw | ||
| 1959 | ffiolredyn y mynydd | Enw | mountain bladder-ferns (Cystopteris montana). | |
| 1960 | ffion y ffridd | Enw | ||
| 1961 | ffisiotherapi | Enw | Equivalent to 'Physiotherapy': Therapy that uses physical techniques such as massage, ultrasound, heat, and exercise. | |
| 1962 | ffiwdaliaeth | Enw | Equivalent to 'Feudalism': A social system based on personal ownership of resources and personal fealty between a suzera… | |
| 1963 | fflam yr haul | Enw | ||
| 1964 | fflipfflops | Enw | /ˈflɪpflɔps/ | |
| 1965 | ffoaduriaid | Enw | ||
| 1966 | fföedigaeth | Enw | ||
| 1967 | ffon y bugail | Enw | shepherd's rod, shepherd's staff, small teasel (Dipsacus pilosus). | |
| 1968 | ffon y plant | Enw | common cattail, common bulrush (Typha latifolia). | |
| 1969 | ffonolegydd | Enw | ||
| 1970 | ffotograffau | Enw | /ˌfɔtɔˈɡrafaɨ̯/ | |
| 1971 | ffotograffiau | Enw | /ˌfɔtɔˈɡrafjaɨ̯/ | |
| 1972 | ffotograffig | Enw, Ansoddair | /ˌfɔtɔˈɡrafɪɡ/ | photographic. |
| 1973 | ffotograffwr | Enw | /ˌfɔtɔˈɡrafʊr/ | photographer. |
| 1974 | ffotograffwyr | Enw | /ˌfɔtɔɡˈrafwɨ̞r/ | |
| 1975 | ffotograffydd | Enw | /ˌfɔtɔɡˈrafɨ̞ð/ | Equivalent to 'photographer': One who takes photographs, typically as an occupation. |
| 1976 | ffracsiynol | Enw | ||
| 1977 | ffraethineb | Enw | wit, witty. | |
| 1978 | ffrithiolyn | Enw | /frɪθˈjɔlɨ̞n/ | Equivalent to 'Fricative': Any of several speech sounds produced by air flowing through a constriction in the oral cavit… |
| 1979 | ffroenuchel | Enw, Ansoddair | /frɔɨ̯ˈnɨ̞χɛl/ | Equivalent to 'hoity-toity': Behaviour adopted to demonstrate one's superiority; pretentious or snobbish behaviour; airs… |
| 1980 | ffrwchnedden | Enw | /frʊχˈnɛðɛn/ | singulative of ffrwchnedd (“bananas”). |
| 1981 | ffrwydrolyn | Enw | /frʊɨ̯dˈrɔlɨ̞n/ | Equivalent to 'Plosive': A speech sound produced by opening a closed vocal tract. |
| 1982 | ffrwythflew | Enw | ||
| 1983 | ffrwythfrân | Enw | /ˈfrʊɨ̯θvraːn/ | fruitcrow (Querula, Pyroderus, Haematoderus or Gymnoderus). |
| 1984 | ffrwythlondeb | Enw | Equivalent to 'Fertility': The condition, or the degree, of being fertile. | |
| 1985 | ffug-gedrwydd | Enw | bastard cedars. | |
| 1986 | ffug-saffrwm | Enw | safflower (Carthamus tinctorius). | |
| 1987 | ffugbys rhuddlas garw-godog | Enw | Bithynian vetch (Vicia bithynica). | |
| 1988 | ffugwyddonol | Enw | ||
| 1989 | ffurfeiddio | Enw | ||
| 1990 | ffurfeiddiol | Enw | ||
| 1991 | ffurfiannol | Ansoddair | /fɨ̞rvˈjanɔl/ | formative. |
| 1992 | ffurfioldeb | Enw | ||
| 1993 | ffwrnais drawsnewidydd ocsigen | Enw | ||
| 1994 | ffwythiant dosraniad cronnus | Enw | ||
| 1995 | ffyddlondeb | Enw | faithfulness, fidelity. | |
| 1996 | ffyngataliol | Enw | ||
| 1997 | ffyngladdwr | Enw | ||
| 1998 | ffyngleiddiad | Enw | ||
| 1999 | ffynhonnell | Enw | source, citation. | |
| 2000 | ffynidwydd y Cawcasws | Enw | Nordmann fir or Caucasian fir trees (Pseudotsuga Menziesii). |