| reach depths(expression, decline, weaken, lessen, degenerate) |
| sap(decline, weaken, lessen, degenerate, deteriorate) |
| shrivel(decline, weaken, lessen, degenerate, deteriorate) |
| sicken(decline, weaken, lessen, degenerate, deteriorate) |
| sink(decline, weaken, lessen, degenerate, deteriorate) |
| slump(decline, weaken, lessen, degenerate, deteriorate) |
| taint(noun, verb, decay, uncleanness) |
| turn(verb, decline, weaken, lessen, degenerate) |
| wane(verb, decline, weaken, lessen, degenerate) |
| waste away(expression, decline, weaken, lessen, degenerate) |
| wear away(expression, decline, weaken, lessen, degenerate) |
| break down(verb, expression, decay, taint, disintegrate) |
| go off(verb, expression, decay, taint) |
| weaken(decline, degenerate, deteriorate, worsen, crumble) |
| addle(verb, decay, taint, decompose) |
| become tainted(verb, expression, decay, taint) |
| become useless(verb, expression, decay, taint) |
| go rotten(verb, expression, decay) |
| grow moldy(expression, decompose, molder) |
| turn bad(verb, expression, decay, taint) |