souvenir (n.)youdaoicibaDictYouDict[souvenir 词源字典]
1775, "a remembrance or memory," from French souvenir (12c.), from Old French noun use of souvenir (v.) "to remember, come to mind," from Latin subvenire "come to mind," from sub- "up from below" (see sub-) + venire "to come" (see venue). Meaning "token of remembrance, memento" is first recorded 1782.[souvenir etymology, souvenir origin, 英语词源]