Same word as Fading away:

abate, bate,break down,crumble,decay,decline,degenerate,deteriorate, dilapidate,diminish,disappear,droop, ease off,ebb,end, expire,fade, fade away, fade out,fail,fall, fizzle out, go bad, go downhill,halt,lapse, let up, lose power, melt away,moderate, mol