Or maniul {man-ool'}; from na'al; a bolt -- lock.
see HEBREW na'al
H4514. manul
מַנְעוּל noun [masculine] bolt; — absolute הַמּ ׳כַּמּוֺת Song of Solomon 5:5 (of house-door); plural suffix מַנְעוּלָיו Nehemiah 3:3, מַנְעֻלָיו 3:6; 3:13; 3:14; 3:15, all of city- gates, in phrase וּבְרִיחָיו (וּ)מַנ ׳דַּלְתֹתָיו.