sub-aqueous
Definitions
Adjective. [C1]
Examples
“The tunnel is 4 miles 628 yd. long, and is the longest tunnel on a British main-line railway, and the longest sub-aqueous tunnel in the world.”
“[...] he'd been hoping to build⟳ a bridge over the River Nova in St Petersburg. The Russians would eventually decide⟳ to go under the river, but not before Brunel had shown the way, by building the first sub-aqueous tunnel in the world.”
CEFR level
C1
Advanced
This word is part of the CEFR C1 vocabulary — advanced level.
This word is part of the CEFR C1 vocabulary — advanced level.
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