underwater

American  

[uhn-der-waw-ter, -wot-er] / ˈʌn dərˈwɔ tər, -ˈwɒt ər /

adjective

1. existing or occurring under water.

2. designed to be used under water.

3. located below a ship's waterline.

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adverb

1. beneath the water.

   to travel underwater.

noun

1. the water beneath the surface.

   cold currents in the underwater.

2. underwaters, the depths, as of a sea, lake, etc.

underwater British  

/ ˈʌndəˈwɔːtə /

adjective

1. being, occurring, or going under the surface of the water, esp the sea

   underwater exploration

2. nautical below the water line of a vessel

3. (of a stock option or other asset) having a market value below its purchase value

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adverb

1. beneath the surface of the water

Etymology

Origin of underwater

First recorded in 1620–30; under- + water

Example Sentences

The company is testing Anello’s inertial navigation as a way for its micro subs to travel miles underwater—where GPS doesn’t work—and to navigate on the surface in GPS-denied areas.

From The Wall Street Journal

Patalano said countries with a sophisticated underwater force enjoy an "objective advantage" in the event of a naval confrontation.

From Barron's

Rapid improvements are making Beijing’s underwater navy quieter and faster, capable of carrying more advanced weapons and better sensors and able to remain submerged for longer.

From The Wall Street Journal

My reflexes were so slow, it was like I was underwater.

From The Wall Street Journal

Some rest over deep troughs or underwater mountains, while others lie across broad, flat plains.

From Science Daily

Related Words

• submerged
• undersea