| reach depths(expression, decline, weaken, lessen, degenerate) |
| sap(verb, decline, weaken, lessen, degenerate) |
| shrivel(verb, decline, weaken, lessen, degenerate) |
| sicken(verb, decline, pain, weaken, lessen) |
| sink(verb, decline, weaken, lessen, degenerate) |
| slump(verb, decline, weaken, lessen, degenerate) |
| suppurate(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) |
| addle(verb, decay, taint, decompose) |
| fester(decompose, molder) |
| weaken(decline, degenerate, deteriorate, worsen, crumble) |
| become tainted(verb, expression, decay, taint) |
| become useless(verb, expression, decay, taint) |
| break down(verb, expression, dull, spoil, decay) |
| go rotten(verb, expression, decay) |
| grow moldy(expression, decompose, molder) |
| taint(verb, dull, spoil, decay, sour) |
| turn bad(verb, expression, decay, taint) |