To enlist (someone) or make (someone) a member of
To enlist oneself (in something) or become a member (of something)
To enter (a name, etc.) in a register, roll or list
To hand over (something to someone), place into the care or control of another.
To quit (a job or position).
To submit passively; to give up as hopeless or inevitable.
To give up; to relinquish ownership of.