excommunication (n.)youdaoicibaDictYouDict[excommunication 词源字典]
mid-15c., from Late Latin excommunicationem (nominative excommunicatio), noun of action from past participle stem of excommunicare "put out of the community," in Church Latin "to expel from communion," from ex- "out" (see ex-) + communicare, from communis "common" (see common).[excommunication etymology, excommunication origin, 英语词源]