Enroll

verb

1. To enter (a name, etc.) in a register, roll or list
2. To enlist (someone) or make (someone) a member of

   "They were eager to enroll new recruits."

3. To enlist oneself (in something) or become a member (of something)

   "Have you enrolled in classes yet for this term?"

4. To envelop; to enwrap.