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View synonyms for

underwater

[ uhn-der-waw-ter, -wot-er ]

adjective

  1. existing or occurring under water.
  2. designed to be used under water.
  3. located below a ship's waterline.


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

/ ˈʌԻəˈɔːə /

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
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012

adverb

  1. beneath the surface of the water
“Collins English Dictionary — Complete & Unabridged” 2012 Digital Edition © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word History and Origins

Origin of underwater1

First recorded in 1620–30; under- + water
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Example Sentences

Examples have not been reviewed.

Even on immigration, his supposed strong suit, he's underwater, the Economist You/Gov poll shows:

From

Next it's a painstakingly complex procedure, lowering the elements 40 metres down into a trench dug out on the seafloor, using underwater cameras and GPS-guided equipment, to line it up with 15mm precision.

From

Around two-thirds of the world's volcanoes are underwater, but they are hardly monitored.

From

The wreck, which lies 3,800m down in the icy waters of the Atlantic, was mapped using underwater robots.

From

Instead, they swim sideways, spend much of their time underwater, have long snouts and are almost completely blind.

From

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underwaistunderway