מִשְׁמֶרֶת, preced.) guard, trnsf. (v. גֶּדֶר) preventive measure. M. Kat. 5ᵃ; Yeb. 21ᵃ (ref. to Lev. XVIII, 30) עשו מ׳ למִשְׁמַרְתִּי make a guard to my guard, enact measures to prevent a transgression of Biblical laws.