irreconcilable (adj.)youdaoicibaDictYouDict[irreconcilable 词源字典]
1590s, from French irréconcilable (16c.), from Medieval Latin *irreconcilabilis, from assimilated form of in- "not, opposite of" (see in- (1)) + reconcilabilis (see reconcile). Related: Irreconcilably. As a noun from 1748.[irreconcilable etymology, irreconcilable origin, 英语词源]