- irrevocable (adj.)
[irrevocable 词源字典]
- also irrevokable, late 14c., from Latin irrevocabilis "that cannot be recalled, unalterable," from assimilated form of in- "not, opposite of" (see in- (1)) + revocabilis (see revoke). Related: Irrevocably. [irrevocable etymology, irrevocable origin, 英语词源]