קוּר qûwr (H6979)

to trench; by implication, to throw forth; to wall up, whether literal (to build a wall) or figurative (to estop)

1) (Qal) to bore, dig, dig for water 2) to be cold 2a) (Hiphil) to make or keep cool 3) (Pilpel) destroy, break down

a primitive root; also denominative from קִיר (H7023)