guard

a place where guards stand, a post, a soldier or guard whose job is to stand and keep watch, sentinel, guarding, watching, turn of watch, watch and ward, guard, protection, confinement, custody, arrest

keep a watch

to change the guard, to relieve the watch or guard

remove the guard, let go, to remove monitoring

to place a guard (over or at), to place a guard over impose restrictions, curl

change the post

a masked guard, vanguard (of an army)

watch and ward

period of prosperity

secret surveillance, (army's) vanguard or reconnaissance party

time when something is on the wane, old age