underwater.
Beneath the surface of the water; of or pertaining to the region beneath the water surface.
Meaning & usage
Beneath the surface of the water; of or pertaining to the region beneath the water surface.
Watch out for underwater obstacles.
He was a pioneer in underwater exploration.
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.
Where this word comes from
From under (preposition) + water.
So as to go beneath the surface of the water.
Can you swim underwater?
Where this word comes from
From under (preposition) + water.
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.
Where this word comes from
From under (preposition) + water.
To water or irrigate insufficiently.
Care must be taken not to underwater houseplants in the summer.
Where this word comes from
Etymology tree Proto-Indo-European *h₁én Proto-Indo-European *-tér Proto-Indo-European *h₁entér Proto-Indo-European *h₂én Proto-Indo-European *dʰeh₁-? Proto-Indo-European *-dʰi ? Proto-Indo-European *(H)n̥dʰí Proto-Indo-European *-ér Proto-Indo-European *(H)n̥dʰér Proto-Germanic *under Proto-West Germanic *undar Old English under- Middle English under- English under- Proto-Indo-European *wed- Proto-Indo-European *-r̥ Proto-Indo-European *wódr̥ Proto-Germanic *watōr Proto-West Germanic *watar Old English wæter Middle English water English water English underwater From under- + water.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.