enroll (v.)youdaoicibaDictYouDict[enroll 词源字典]
mid-14c. (transitive), from Old French enroller "record in a register, write in a roll" (13c., Modern French enrôler), from en- "make, put in" (see en- (1)) + rolle (see roll (n.)). Related: Enrolled; enrolling.[enroll etymology, enroll origin, 英语词源]