Klein Dictionary, נצר ᴵ 1

נצר ᴵ to watch, guard, keep, to put on the safety catch (in a weapon).
    — Qal - נָצַר 1 he watched, guarded, kept; 2 he guarded from danger, preserved; 3 he observed; 4 he kept secret; 5 he kept close, blockaded. NH 6 he put on the safety catch (in a weapon).
    — Niph. - נִנְצַר MH 1 was watched, was guarded, was kept; NH 2 was kept close, was blockaded. [Aram.-Syr. נְטַר (= he watched, guarded, kept), Arab. naẓara (= he looked at, considered, examined; but Arab. natur, ‘overseer’, is an Aram. loan word), Ethiop. naṣara (= he looked at, observed), Akka. naṣāru (= to watch over, protect). cp. the collateral form נטר, cp. also נָדִיר ᴵᴵ.] Derivatives: נָצוּר, נִצְרָה, נוֹצֵר, נְצִירָה.