excess (n.)youdaoicibaDictYouDict[excess 词源字典]
late 14c., from Old French exces (14c.) "excess, extravagance, outrage," from Latin excessus "departure, a going beyond the bounds of reason or beyond the subject," from stem of excedere "to depart, go beyond" (see exceed). As an adjective from late 15c.[excess etymology, excess origin, 英语词源]