abate, ablate, bate, be eaten away, become suicidal, break, cave in, collapse, come apart, come unstuck, conk out, consume, consume away, corrode, crumble, decline, decrease, deliquesce, desiccate, despair, despond, deteriorate, die away, diminish, disintegrate, dive, droop, drop, drop off, dry up, dwindle, ebb, erode, fade, fade away, fail, faint, fall, fall away, fall off, fizzle out, flag, give out, give way, go downhill, go soft, go to pieces, hit rock bottom, hit the skids, lessen, let up, lose heart, lose strength, melt away, peak, peg out, peter out, pine, plumb the depths, plummet, plunge, poop out, reach the depths, run down, run low, sag, sear, shrink, shrivel, sink, subside, tail off, touch bottom, wane, waste, waste away, weaken, wear, wear away, wear thin, wilt, wither, wither away, wizen, yield