lotion (n.)youdaoicibaDictYouDict[lotion 词源字典]
c. 1400, loscion, from Old French lotion (14c.), from Latin lotionem (nominative lotio) "a washing," from lotus, popular form of lautus, past participle of lavere "to wash" (see lave). As a verb, from 1817. Related: Lotioned; lotioning.[lotion etymology, lotion origin, 英语词源]