subaqueous

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US, UK/səbˈeɪ.kwi.əs/Australia/sɐˈbæek.wi.əs/New Zealand/sɐˈbæek.wi.ɘs/

adjective

Existing below the water surface.

“subaqueous light”

Opposite
RareScrabble 21

Meanings

adjectivesubaqueous (not comparable)

alternative sub-aqueous · alternative subaquæous

  1. not comparableExisting below the water surface.

    subaqueous deposits

  2. not comparableDesigned for underwater use.

    a subaqueous helmet

  3. not comparableWeak and filtered.

    subaqueous light

    1 more example

    The room was dimly lit by a subaqueous light filtering through a green blind, and Rita had to edge her way round a double bed that barely allowed room to reach a bedside table, for the room, like every other apartment in the house, was clogged with old furniture.

    1950, Norman Lindsay, Dust or Polish?, Sydney: Angus and Robertson, page 11

Synonyms & antonyms

Opposite

adjectivegrowing or remaining under water

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Proto-Indo-European*upó
  2. Proto-Italic*supo
  3. Latinsub
  4. Latinsub-
  5. Englishsub-
  6. Englishaqueous
  7. Englishsubaqueous

From sub- + aqueous.

Full word history & related roots →
Cite this entry
APA

subaqueous. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/subaqueous

MLA

“subaqueous.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/subaqueous. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “subaqueous,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/subaqueous.

Source: subaqueous on Wiktionary, CC BY-SA 4.0.