Definition of sub-water in US English:

sub-water

noun

  • Water that occurs beneath the earth's surface in soil, rocks, etc.

adjective

  • Attributive Situated, taking place, or used underwater.

Origin

Early 19th century; earliest use found in Charles Vancouver (bap. 1756, d. ?1815), agricultural improver and writer. From sub- + water.

Pronunciation

sub-water

/ˈsʌbˌwɔːtə/