eruption (n.)youdaoicibaDictYouDict[eruption 词源字典]
early 15c., from Middle French éruption (14c.) and directly from Latin eruptionem (nominative eruptio) "a breaking out," noun of action from past participle stem of erumpere "break out, burst forth" (see eruption).[eruption etymology, eruption origin, 英语词源]