LATIN DICTIONARYLexicon Latīnum
adjective

sŭb-ăquānĕus

Meaning

  1. that is

sŭb-ăquānĕus, a, um, adj. aqua,
I. that is or belongs under water, sub-aqueous: subterraneum et subaquaneum viventia carent haustu aëris, Tert. Anim. 32.

Quick answers

What does sŭb-ăquānĕus mean in Latin?
sŭb-ăquānĕus, a adjective, means “that is”.