A primitive root meaning to cover over, hedge about, screen or protect. Used of God covering the mercy seat, shielding His people, and the cherubim covering the ark.
Sakak is the verb of divine protection. The cherubim 'covered' the mercy seat (Exodus 25:20). Psalm 91:4: God 'shall cover thee with his feathers.' Exodus 33:22: God covers Moses with His hand. God screens His people from destruction and covers their sin with mercy.