māsas מָסַס ‘to melt’ (Hebrew)

Etymology^?: a primitive root

māsas v
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