intervention (n.)youdaoicibaDictYouDict[intervention 词源字典]
early 15c., "intercession, intercessory prayer," from Middle French intervention or directly from Late Latin interventionem (nominative interventio) "an interposing," noun of action from past participle stem of Latin intervenire "to come between, interrupt," from inter- "between" (see inter-) + venire "come" (see venue).[intervention etymology, intervention origin, 英语词源]