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
At 62, Robinson is a scuba instructor and the owner of ZooKeeper, which makes a sort of underwater creel for safely storing lionfish during dives and sponsors lionfish derbies across the state.
—
Rayna O'Nan, Outdoor Life, 12 Mar. 2026
The brand also shared an underwater perspective, highlighting her layered necklaces and bracelets submerged beneath the surface.
—Danielle Minnetian, FOXNews.com, 11 Mar. 2026
One of the most famous shipwrecks in United States history has received a glow-up, courtesy of stunningly detailed, underwater 3D scanning technology.
—Andrew Paul, Popular Science, 11 Mar. 2026
After 81 nearly drowns during an underwater drill, the regiment leaders (played by Dennis Quaid and Esai Morales) express concern that his PTSD from losing his brother might put him at risk or affect the team.
—Allison Degrushe, Entertainment Weekly, 10 Mar. 2026
See All Example Sentences for underwater
Rayna O'Nan, Outdoor Life, 12 Mar. 2026
The brand also shared an underwater perspective, highlighting her layered necklaces and bracelets submerged beneath the surface.
—Danielle Minnetian, FOXNews.com, 11 Mar. 2026
One of the most famous shipwrecks in United States history has received a glow-up, courtesy of stunningly detailed, underwater 3D scanning technology.
—Andrew Paul, Popular Science, 11 Mar. 2026
After 81 nearly drowns during an underwater drill, the regiment leaders (played by Dennis Quaid and Esai Morales) express concern that his PTSD from losing his brother might put him at risk or affect the team.
—Allison Degrushe, Entertainment Weekly, 10 Mar. 2026
See All Example Sentences for underwater
Recent Examples of Synonyms for underwater
Adjective
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These provide new insights into semi-aquatic peirosaurid crocodyliforms and expand our understanding of their reproductive strategies.—
Maria Mocerino,
Interesting Engineering,
7 Mar. 2026
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But with Frisco's ramp closed, every boat that launches will need to go through Dillon, not to mention processes and procedures with taking boats out like aquatic nuisance species inspections.—
Spencer Wilson,
CBS News,
4 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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They are designed to sneak in close to their target undetected, and launch surprise attacks while remaining submerged.—
James Dwyer,
Fortune,
6 Mar. 2026
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On Sunday, their aerial unit located his submerged pickup truck in a canal off East Cypress Creek Road, with his body inside.—
Joan Murray,
CBS News,
27 Jan. 2026
Cite this Entry
“Underwater.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underwater. Accessed 17 Mar. 2026.
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