Significatio vocis nedum | Babel Free

Definitiones

1. by no means, much less, not to speak of
2. not to say, much more
3. let alone

Aequivalentia

Exempla

“aegre inermem tantam multitudinem, nedum armatam, sustineri posse”

we could hardly resist an unarmed crowd, let alone an armed one

Gradus CEFR