evaporation (n.)youdaoicibaDictYouDict[evaporation 词源字典]
late 14c., from Old French évaporation and directly from Latin evaporationem (nominative evaporatio), noun of action from past participle stem of evaporare "disperse in vapor or steam," from assimilated form of ex- "out" (see ex-) + vapor "steam" (see vapor).[evaporation etymology, evaporation origin, 英语词源]