- impure (adj.)
[impure 词源字典]
- mid-15c., from Middle French impur (13c.), from Latin impurus "unclean, filthy, foul," from assimilated form of in- "not, opposite of" (see in- (1)) + purus "pure" (see pure). As a noun from 1784. Related: Impurely.[impure etymology, impure origin, 英语词源]