prison

to monitor; to keep a close watch over; surveillance

to monitor

to imprison; to jail; to take into custody

to supervise; to oversee; to inspect

head; director (of an organizational unit); (police) commissioner; inspector-general; rank of local governor in Tang dynasty administration

court eunuch; palace eunuch

to visit a prisoner (usu. a relative or friend)

school official responsible for supervising the students (old)

to imprison; to take into custody