An apprentice is literally "one who grasps" — the same Latin root behind "apprehend" links seizing knowledge to seizing criminals.
A person learning a trade or craft from a skilled employer, typically for a fixed period. Also used as a verb meaning to bind someone as an apprentice.
From Old French aprentis (one who learns), from aprendre (to learn), from Latin apprehendere (to seize, grasp mentally), from ad- (to) + prehendere (to grasp) Key roots: apprehendere (Latin: "to seize, to grasp mentally"), *ghend- (Proto-Indo-European: "to seize, take").