di- (1)

word-forming element meaning "two, double, twice," from Greek di-, from dis "twice," related to duo "two," from PIE root *dwo- "two."

di- (2)

word-forming element meaning "apart, asunder," form of dis- before certain voiced consonants.

di- (3)

word-forming element meaning "through; thoroughly," form of dia- before vowels.

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