underwater

adj.

1. Relating to, occurring, used, or performed beneath the surface of water.
2. Nautical. Below the water line of a vessel.

underwater un'der·wa'ter adv.

IN BRIEF: Below the surface of the liquid that forms lakes and streams.

It was like hunting fish with an underwater gun, a sport which he had once been foolish enough to try. — Iris Murdoch (1919-1999).

Note: click on a word meaning below to see its connections and related words.

The adjective has 2 meanings:

Meaning #1: beneath the surface of the water
  Synonyms: submerged, submersed

Meaning #2: (biology) growing or remaining under water
  Synonyms: subaqueous, subaquatic, submerged, submersed

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Dansk (Danish)
adj. - under vand
adv. - undervands

Nederlands (Dutch)
onder water (gelegen), onderwater-

Français (French)
adj. - sous-marin, sous/dans l'eau
adv. - sous l'eau

Deutsch (German)
adj. - Unterwasser-
adv. - unter Wasser

Ελληνική (Greek)
adj. - υποβρύχιος
adv. - υποβρυχίως, (καθομ.) σε δύσκολη θέση

Italiano (Italian)
subacqueo, sott'acqua

Português (Portuguese)
adj. - subaquático
adv. - em baixo da água

Русский (Russian)
подводный, под водой, подземные воды

Español (Spanish)
adj. - submarino, subacuático
adv. - debajo del agua

Svenska (Swedish)
adj. - undervattens-
adv. - under vattnet

中文（简体）(Chinese (Simplified))
在水下的, 在水中的, 在水下, 在水线以下

中文（繁體）(Chinese (Traditional))
adj. - 在水下的, 在水中的
adv. - 在水下, 在水線以下

한국어 (Korean)
adj. - 수면하의, 수중의
adv. - 수면하에, 물속에서

日本語 (Japanese)
adj. - 水面下の, 水中の, 水中用の
adv. - 水面下に

العربيه (Arabic)
‏(صفه) (ظرف) تحت الماء‏

עברית (Hebrew)
adj. - ‮תת-מימי‬
adv. - ‮(נמצא או נעשה) מתחת למים‬

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Dsc-p93 Underwater	Underwater Case Canon S70
S410 Underwater	Underwater Case F450