ineluctable (adj.)youdaoicibaDictYouDict[ineluctable 词源字典]
"not to be escaped by struggling," 1620s, from Latin ineluctabilis "unavoidable, inevitable," from in- "not, opposite of" (see in- (1)) + eluctari "to struggle out of," from ex- "out" (see ex-) + luctari "to struggle" (see reluctance).[ineluctable etymology, ineluctable origin, 英语词源]