expugn (v.)youdaoicibaDictYouDict[expugn 词源字典]
early 15c., "eradicate, exterminate," also "conquer, capture by fighting," from Old French expugner, from Latin expugnare "to take by assault, storm, capture" (source also of Spanish expugnar, Italian espugnare), from ex- (see ex-) + pugnare "to fight" (see pugnacious). Related: Expugned; expugnable.[expugn etymology, expugn origin, 英语词源]