רָקַע râqaʻ (H7554)

to pound the earth (as a sign of passion); by analogy to expand (by hammering); by implication, to overlay (with thin sheets of metal)

1) to beat, stamp, beat out, spread out, stretch 1a) (Qal) 1a1) to stamp, beat out 1a2) one who beats out (participle) 1b) (Piel) to overlay, beat out (for plating) 1c) (Pual) beaten out (participle) 1d) (Hiphil) to make a spreading (of clouds)

a primitive root;