underwater

adjective

ˌən-dər-ˈwȯ-tər How to pronounce underwater (audio)
Definition of underwaternext
as in aquatic
living, lying, or occurring below the surface of the water underwater plants don't require as much light to grow as surface plants a vessel designed for underwater exploration

Synonyms & Similar Words

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Example Sentences

Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
Recent Examples of underwater The team analyzed maps showing where continents lay underwater or dry at 10-million-year time points. — Jacek Krywko, Scientific American, 1 Oct. 2026 Nevertheless, the race for underwater critical minerals may soon heat up. — Michael Albertus, Foreign Affairs, 30 Sep. 2026 Trump’s approval ratings among Latinos were underwater in deep-red states like Texas and Florida — and this was months before our current economic and political malaise started. — Gustavo Arellano, Los Angeles Times, 30 Sep. 2026 The Egan Maritime Institute said its exhibits and collections manager would survey the site and send a report to state underwater archaeologists, who then will work with the institute to determine which vessel the wreckage came from. — CBS News, 29 Sep. 2026 See All Example Sentences for underwater
Recent Examples of Synonyms for underwater
  1. aquatic
  2. submarine
  3. submerged
Adjective
  • Discharging untreated whey can deplete oxygen in waterways and damage aquatic ecosystems.
    — New Atlas, New Atlas, 3 Oct. 2026
  • Because microorganisms in water turn regular mercury into methylmercury, a toxic chemical form that binds tightly to fish tissue, the heavy metal accumulates to higher levels in aquatic animals.
    — Sandee LaMotte, CNN Money, 2 Oct. 2026
Definition of aquatic
Adjective
  • The third pillar expands on this approach by increasing the capacity of the wider submarine industrial base.
    — Georgina Jedikovska, Interesting Engineering, 22 Sep. 2026
  • But a new antenna technology, borrowed from the physics of medical implants, is rethinking how submarine machines talk to each other – and to us.
    — Omar Kardoudi June 06, New Atlas, 6 June 2026
Definition of submarine
Adjective
  • Advanced blue-green optical communications penetrate the water column to communicate with submerged submarines without requiring them to deploy compromise-prone antennas.
    — Rohit Jha, Forbes.com, 1 Oct. 2026
  • Rescue teams recovered four bodies from inside the submerged vessel on Friday, while seven more were found along nearby shorelines, Bramantyo said.
    — ABC News, ABC News, 27 Sep. 2026
Definition of submerged

Browse Nearby Words

undervaluing
underwater
under way
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Cite this Entry

“Underwater.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underwater. Accessed 9 Oct. 2026.

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