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
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Recent Examples of underwater
Heat released by underwater data centers could disturb marine ecosystems.
—
Aamir Khollam, Interesting Engineering, 3 Oct. 2025
Read on for more, including an underwater robot exploring Lake Michigan.
—Dinah Voyles Pulver, USA Today, 3 Oct. 2025
The opening image somersaults backward twice before settling quietly just over the surface of an undisturbed reservoir, then submerging to reveal digital animation of its underwater topography.
—Anne Reeve, Artforum, 1 Oct. 2025
The city’s budget is completely underwater, and has to conserve resources by implementing brownouts and reductions.
—Claire Franken, TVLine, 1 Oct. 2025
See All Example Sentences for underwater
Aamir Khollam, Interesting Engineering, 3 Oct. 2025
Read on for more, including an underwater robot exploring Lake Michigan.
—Dinah Voyles Pulver, USA Today, 3 Oct. 2025
The opening image somersaults backward twice before settling quietly just over the surface of an undisturbed reservoir, then submerging to reveal digital animation of its underwater topography.
—Anne Reeve, Artforum, 1 Oct. 2025
The city’s budget is completely underwater, and has to conserve resources by implementing brownouts and reductions.
—Claire Franken, TVLine, 1 Oct. 2025
See All Example Sentences for underwater
Recent Examples of Synonyms for underwater
Adjective
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Question 1 asks voters to approve $158 million to renovate neighborhood parks, design and construct new city parks, improve multi-use fields and renovate existing pools and aquatic centers.—
Maritza Dominguez,
AZCentral.com,
4 Oct. 2025
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The following Pitch Day showcased industry-crossing solutions like aquatic ecosystem protection, fashion and beauty raw materials, waterless dyeing, water-saving and energy-saving manufacturing, wastewater reduction and treatment, as well as microplastic and microfiber detection.—
Alexandra Harrell,
Sourcing Journal,
3 Oct. 2025
Adjective
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Last December, lawmakers passed a short-term funding bill that included $5.7 billion in emergency funding for the submarine industrial base.—
Lisa Hagen,
Hartford Courant,
6 Aug. 2025
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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
Adjective
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By contrast, ocean currents can naturally regulate the temperature of submerged servers.—
Aamir Khollam,
Interesting Engineering,
3 Oct. 2025
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Pier 500 would use 124 acres of submerged infrastructure that was added during the construction of Pier 400.—
Glenn Taylor,
Sourcing Journal,
3 Oct. 2025
Cite this Entry
“Underwater.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underwater. Accessed 8 Oct. 2025.
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