underwater

Definitions of underwater
1

adj beneath the surface of the water

Synonyms:
submerged, submersed
subsurface
beneath the surface

adj growing or remaining under water

Synonyms:
subaquatic, subaqueous, submerged, submersed
aquatic
operating or living or growing in water

Sign up, it's free!

Whether you're a student, an educator, or a lifelong learner, Vocabulary.com can put you on the path to systematic vocabulary improvement.