underwater

/ʌndə(ɹ)ˈwɔːtə/

underwater means beneath the surface of the water; of or pertaining to the region beneath the water surface. Lexicurio rates it Distinctive — a strength score of 66 out of 100.

underwater is pronounced /ʌndə(ɹ)ˈwɔːtə/.

Etymology

From under (preposition) + water.

adj

Beneath the surface of the water; of or pertaining to the region beneath the water surface.“Watch out for underwater obstacles.”
Beneath the water line of a vessel.“When the ship was brought into dry dock, it was found that she had underwater damage.”
In difficulty, especially financially.
Having negative equity; owing more on an asset than its market value.“We've been underwater on our mortgage ever since the housing crash.”
Of an option, having a strike price higher (call options) or lower (put options) than the current market price of the underlying asset or financial product; for example, an option to buy shares at $20 when the current market price is $15.

adv

So as to go beneath the surface of the water.“Can you swim underwater?”

noun

Underlying water or body of water, for example in an aquifer or the deep ocean.
A type of lure which lies beneath the water surface.“Practically all wobbling underwaters will take fish aplenty in the hands of a man who really knows how to put them through their stints.”

verb

To water or irrigate insufficiently.“Care must be taken not to underwater houseplants in the summer.”