מָסַס mâçaç (H4549)

to liquefy; figuratively, to waste (with disease), to faint (with fatigue, fear or grief)

1) to dissolve, melt 1a) (Qal) to waste away 1b) (Niphal) 1b1) to melt, vanish, drop off, melt away 1b2) to faint, grow fearful (fig.) 1b3) wasted, worthless (participle) 1c) (Hiphil) to cause to melt

a primitive root;