di-

{{11}}di- (1) prefix meaning "two, double, twice," from Gk. di-, from dis "twice," related to duo (see TWO (Cf. two)).

{{12}}di- (2) "apart, asunder," form of DIS- (Cf. dis-) before certain voiced consonants.

{{12}}di- (3) "through; thoroughly," form of DIA- (Cf. dia-) before vowels.