To cover or plaster.
Because, even because they have seduced my people, saying, Peace; and there was no peace; and one built up a wall, and, lo, others DAUBED it with untempered mortar: Say unto them which DAUB it with untempered mortar, that it shall fall: there shall be an overflowing shower; and ye, O great hailstones, shall fall; and a stormy wind shall rend it. ( Ezekiel 13:10-11 )
Bibliography Information"Entry for 'Daub'". A King James Dictionary.