Below the level of the surrounding or adjoining area
Growing or remaining under water:
Hidden or undisclosed.
Adapted for underwater use or existence; underwater
Marine is defined as something related to water or the sea.
Find another word for underwater. In this page you can discover 16 synonyms, antonyms, idiomatic expressions, and related words for underwater, like: sunken, undersea, subaquatic, submersed, deep-sea, under, submarine, submerged, re-breathers, subaqueous and marine.