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
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Example Sentences
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Recent Examples of underwater
Take your snorkel and mask—the underwater scenery here is stunning.
—
Elizabeth Heath, Travel + Leisure, 31 Mar. 2026
It’s also known as being underwater on your loan or upside down.
—Sarah Agostino, CNBC, 30 Mar. 2026
Those trials included tests of propulsion systems, navigation, combat equipment, and underwater maneuvering.
—Kaif Shaikh, Interesting Engineering, 30 Mar. 2026
In all, the president is underwater on almost every single public policy issue.
—Los Angeles Times, 29 Mar. 2026
See All Example Sentences for underwater
Elizabeth Heath, Travel + Leisure, 31 Mar. 2026
It’s also known as being underwater on your loan or upside down.
—Sarah Agostino, CNBC, 30 Mar. 2026
Those trials included tests of propulsion systems, navigation, combat equipment, and underwater maneuvering.
—Kaif Shaikh, Interesting Engineering, 30 Mar. 2026
In all, the president is underwater on almost every single public policy issue.
—Los Angeles Times, 29 Mar. 2026
See All Example Sentences for underwater
Recent Examples of Synonyms for underwater
Adjective
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Dyer, from Littleton, Colorado, is the Missouri aquatic program’s first NCAA champion since swimmer Fabian Schwingenschlogl won the 100 breaststroke title eight years ago — and the Tigers’ first-ever national champion diver.—
The Kansas City Star,
Kansas City Star,
28 Mar. 2026
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All that salt is detrimental to a lot of aquatic life and can be problematic for drinking water, too.—
Berly McCoy,
NPR,
25 Mar. 2026
Adjective
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One of the major functions of modern navies is submarine hunting.—
New Atlas,
New Atlas,
18 Jan. 2026
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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
Adjective
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The crash caused the catamaran to become submerged.—
Dennis Romero,
NBC news,
1 Apr. 2026
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Such technology could transform vast maritime regions, such as the South China Sea, into submerged launch pads, enhancing China’s strategic nuclear deterrence and stealth capabilities.—
Mrigakshi Dixit,
Interesting Engineering,
25 Mar. 2026
Cite this Entry
“Underwater.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underwater. Accessed 6 Apr. 2026.
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