Twi-

prefix

Definitions

Prefix
  1. 1
    two idiomatic, morpheme, rare

    "twi-headed"

  2. 2
    double, both idiomatic, morpheme, rare

    "twilight, twisexual, twi-tongued"

Etymology

From Middle English twi-, from Old English twi- (“two, double”), from Proto-Germanic *twi- (“two-, double-”), from Proto-Indo-European *dwi- (“two-, double-”) (compare Proto-Germanic *twiz- (“twice”), from Proto-Indo-European *dwís (“twice”)), from Proto-Indo-European *dwóh₁ (“two”). Compare twin, twice, two, and see more details at two. Further related to the prefixes bi-, di-, and dis-. Cognate with German zwie- (“twice”), Swedish tve- (“twi-, double”), Russian дву- (dvu-), двух- (dvux-) Old Prussian dwi- (“twi-”), Latin bi-, bis (“twice”) (< Old Latin dui-, duis).

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