מִשְׁמֶרֶת

mishmereth. feminine of מִשְׁמָר; 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; charge, keep, or to be kept, office, ordinace, safeguard, ward, watch.