Underwater
/ˈʌndəˌrwɔtər/
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Definition
(adj) Beneath the surface of the water; of or pertaining to the region beneath the water surface.
Sentence Examples
We want to explore an underwater oil field.
If you go underwater, hold your nose and blow to clear your ears.
CEFR Practice Quiz
The explorers used special cameras to take photos of the ____ cave system and its unique rock formations today.