souvenir (n.) Look up souvenir at Dictionary.com
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," from a suffixed form of PIE root *gwā- "to come" (see come). Meaning "token of remembrance, memento" is first recorded 1782.