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bifarious (adj.)[bifarious 词源字典]: 1650s, from Latin bifarius "twofold, double," probably originally "that which can be expressed in two ways" [Klein], from bi- (see bi-) + fari "to speak, say," from PIE root *bha- (2) "to speak, tell, say" (see fame (n.)). Related: Bifariously.[bifarious etymology, bifarious origin, 英语词源]