מִשְׁמֶרֶת mishmereth (H4931)

watch, i.e. the act (custody), or (concretely) the sentry, the post; objectively preservation, or (concretely) safe; figuratively observance, i.e. (abstractly) duty or (objectively) a usage or party

1) guard, charge, function, obligation, service, watch 1a) guard, watch, house of detention or confinement 1b) keeping, preserving 1c) charge, injunction 1d) office, function (ceremonial)

feminine of מִשְׁמָר (H4929);