disciple

Middle English, "follower of Jesus, one of the apostles, pupil," in part going back to Old English discipul, in part borrowed from Anglo-French disciple, both borrowed from Late Latin discipulus "follower of Christ, apostle" (translation of Greek mathētḗs), going back to Latin, "pupil, learner," of uncertain origin

Note: Traditionally explained as a derivative of discere "to learn," but the second element -pulus is neither a known word nor a suffix. According to an alternative explanation, the base is nominalized from an unattested verb *discipere, putatively, "to grasp, comprehend," from dis- dis- and capere "to take, seize" (cf. disceptāre "to dispute, debate," supposedly a frequentative from this verb); this is semantically questionable, however, and -ulus is any case not an agentive suffix.