late 14c., from O.Fr. repeter
"say or do again, get back, demand the return of" (13c.), from L. repetere
"do or say again, attack again," from re-
"again" + petere
"go toward, seek, demand, attack" (see petition
). Specific meaning "to take a course of education over again" is recorded from 1945, Amer.Eng. The noun is first recorded 1556.