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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Recent Examples of underwater
By noon, roughly half of the neighborhood's streets were underwater.
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Da Lin, CBS News, 5 Jan. 2026
Finland seized a ship suspected of sabotaging a telecommunications cable in the Baltic Sea, the latest maneuver in a quiet battle over underwater infrastructure.
—Tom Chivers, semafor.com, 5 Jan. 2026
Once there, police located an unresponsive victim who had been found underwater in a pool.
—Elissa Jorgensen, Dallas Morning News, 5 Jan. 2026
Underground and underwater resources are another possibility.
—Devika Rao, TheWeek, 5 Jan. 2026
See All Example Sentences for underwater
Recent Examples of Synonyms for underwater
Adjective
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During the tours, environmental interpreters will discuss the district’s efforts to restore aquatic habitats and talk about the mussels’ role in filtering water and maintaining stream health.—
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Johnston said sediment and excess nutrients contribute to algae growth, cloud waterways, and harm aquatic life, including oysters in the South River and Chesapeake Bay.—
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.—
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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.—
Adjective
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Researchers from the Japan Agency for Marine-Earth Science and Technology (JAMSTEC), Kyoto University, and partner institutions published a high-resolution 3D reconstruction of the submerged settlement using multibeam echo-sounder surveys combined with historical cadastral maps.—
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Boats often post up in the channel between the two islands, where sculptor Jason deCaires Taylor designed the first underwater eco-museum in France and the Mediterranean—the six submerged statues are in water shallow enough to snorkel around.—
Cite this Entry
“Underwater.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/underwater. Accessed 20 Jan. 2026.
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