מִשְׁמָר mishmâr (H4929)

a guard (the man, the post or the prison); a deposit (figuratively); also (as observed) a usage (abstractly), or an example (concretely)

1) place of confinement, prison, guard, jail, guard post, watch, observance 1a) jail, prison, guard-house 1b) guard, guard post, act of guarding 1c) observances

from שָׁמַר (H8104);