Added 10 October 2026 subaqueous /səbˈeɪ.kwi.əs/ adjective Categories: Describing WordsRare Words adjective ! Definition from WordNet 3.1, Princeton University. Pronunciation from Wiktionary, via Kaikki.org. More about subaqueous at Wordnik → Where our words come from → Growing or remaining under water. viewing subaqueous fauna from a glass-bottomed boat Related Words: subaquaticsubmergedunderwateraquaticsubmersedpyroclasticsuboceanicsubaqueansuperaqueousabove-watersubsurfacesubsea Back to today's word