twi-

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).

twi-

1. (rare or no longer productive) two

   twi-headed

2. (rare or no longer productive) double, both

   twilight, twisexual, twi-tongued

• duo-
• di-
• twy-
• twin-

• wit', wit., WTI, ITW, wit, WIT, Tiw

• tui-, twio-, twy-
• ii- (scribal abbreviation)

Inherited from Proto-West Germanic *twi-, from Proto-Germanic *twi-, from Proto-Indo-European *dwi-.

• IPA^(key): /twi/

twī-

1. two, double

   twieċġe ― double-edged

   twidǣlan ― to divide

2. twice, bi-

   twibrowen ― twice-brewed

3. implying doubt or uncertainty

   twirǣde ― uncertain; in disagreement

• Middle English: twi-, twei-, twy-
  • English: twi-