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 camera in the pool with you for underwater photo shoots, slow-motion cannonball contests, and more.
—
Caley Sturgill, Southern Living, 27 June 2025
Somewhere in the middle of the ocean, there’s an underwater grove of palm trees whose fruits, when ripe, fall upwards.
—The Editors, JSTOR Daily, 26 June 2025
The five-armed figure of many starfish has to be one of the most iconic underwater curiosities in the world.
—Jack Knudson, Discover Magazine, 26 June 2025
At first Spielberg gives you elusive but evocative shots of fins, as well as the shark's own underwater perspective of potential human meals swimming above (to the shark, those legs must look like hams hanging in a butcher’s shop).
—Tom Gliatto, People.com, 21 June 2025
See All Example Sentences for underwater
Caley Sturgill, Southern Living, 27 June 2025
Somewhere in the middle of the ocean, there’s an underwater grove of palm trees whose fruits, when ripe, fall upwards.
—The Editors, JSTOR Daily, 26 June 2025
The five-armed figure of many starfish has to be one of the most iconic underwater curiosities in the world.
—Jack Knudson, Discover Magazine, 26 June 2025
At first Spielberg gives you elusive but evocative shots of fins, as well as the shark's own underwater perspective of potential human meals swimming above (to the shark, those legs must look like hams hanging in a butcher’s shop).
—Tom Gliatto, People.com, 21 June 2025
See All Example Sentences for underwater
Recent Examples of Synonyms for underwater
Adjective
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There was a caddis fly in the bucket, which is a type of aquatic insect, and a few tiny flies.—
Madeline Bodin,
Smithsonian Magazine,
27 June 2025
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Unlike many other leeches, this new aquatic species does not feed on blood, but rather worms and insect larvae, according to researchers.—
Lauren Liebhaber,
Miami Herald,
23 June 2025
Adjective
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Courtney has been pushing the Navy to adopt measures to expand what has become known as the submarine industrial base.—
Edmund H. Mahony,
Hartford Courant,
30 Apr. 2025
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It is expected the Chinese submarine force to grow to 65 boats by 2025 and 80 by 2035 because of an expansion of submarine construction capacity.—
Anders Fogh Rasmussen,
Newsweek,
4 Feb. 2025
Adjective
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Rescue units responding to a submerged truck in a Venice, Florida, canal encountered two large alligators.—
Chris Anderson,
USA Today,
26 June 2025
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What appears as waste may serve as witness—a sock, a spoon, a necklace drifting from a submerged compartment, each hinting at a life once lived.—
Siddhartha Mukherjee,
New Yorker,
16 June 2025
Cite this Entry
“Underwater.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underwater. Accessed 9 Jul. 2025.
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