Word Origin & History
curfewearly 14c., from Anglo-Fr. coeverfu (late 13c.), from O.Fr. covrefeu, lit. "cover fire," from couvre, imper. of couvrir "to cover" + feu "fire." The medieval practice of ringing a bell at fixed time in the evening as an order to bank the hearths and prepare for sleep. The original purpose was to prevent
conflagrations from untended fires. The modern extended sense of "periodic restriction of movement" had evolved by 1800s.