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aqua-

  1. variant of aqui-.
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Origin of aqua-

probably orig. attributive use of aqua, or generalized from words in which it is etymologically the head noun of a phrase, as aquamarine, aquatint
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

Word Origin and History for aqua-

word-forming element meaning "water," from Latin aqua "water; the sea; rain," cognate with Proto-Germanic *akhwo, source of Old English ea "river," Gothic ahua "river, waters," Old Norse Ægir, name of the sea-god, Old English ieg "island;" all from PIE *akwa- "water" (cf. Sanskrit ap "water," Hittite akwanzi "they drink," Lithuanian uppe "a river").

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Online Etymology Dictionary, © 2010 Douglas Harper