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 Also consider exploring the Keys’ underwater world with a scuba diving or snorkeling excursion to Looe Key Reef. — Condé Nast, Condé Nast Traveler, 19 Aug. 2026 For Taiwan, the technology also offers a way to expand its underwater capabilities without relying exclusively on large and expensive platforms. — Kaif Shaikh, Interesting Engineering, 19 Aug. 2026 The findings were formally presented by the Croatian Conservation Institute this summer after years of underwater excavation, Reuters reported. — Andrea Margolis, FOXNews.com, 19 Aug. 2026 The report also found that San Jose, Santa Clara, Sunnyvale, Santa Ana and Mission Viejo had the lowest shares of seriously underwater mortgages in the nation. — Don Sweeney, Sacbee.com, 19 Aug. 2026 See All Example Sentences for underwater
Recent Examples of Synonyms for underwater
  1. aquatic
  2. submarine
  3. submerged
Adjective
  • Milander Aquatic Center has become a hub for aquatic programs in the area, drawing swimmers, families, schools and athletes from Miami Springs, Hialeah Gardens and other parts of Miami-Dade County.
    — Verónica Egui Brito, Miami Herald, 22 Aug. 2026
  • New developments integrate water-centric design and programming, blending environmental psychology with biophilia and wellness to foster continuous connection to aquatic environments, highlighting a growing focus on residential wellness.
    — Jeffrey Steele, Forbes.com, 21 Aug. 2026
Definition of aquatic
Adjective
  • 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
  • Despite the ongoing retirement of older hulls, the PLAN's submarine force is expected to grow to 65 units by 2025 and 80 units by 2035 due to an expansion of submarine construction capacity.
    — Ryan Chan, MSNBC Newsweek, 29 July 2025
Definition of submarine
Adjective
  • But some of the reservoir’s underwater history is well known and will remain submerged for some time yet.
    — Elizabeth Wolfe, CNN Money, 21 Aug. 2026
  • Months of inactivity allow microbes, algae, barnacles and other invertebrates to colonize submerged surfaces.
    — Monica Sanders, Forbes.com, 18 Aug. 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 29 Aug. 2026.

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