| dwindle(verb, decline, separate, weaken, lessen) |
| get worse(verb, expression, decline, weaken, lessen) |
| go to the dogs(verb, expression, idiom, decline, fail) |
| hit rock bottom(expression, idiom, decline, weaken, lessen) |
| hit the skids(verb, expression, idiom, decline, fail) |
| lessen(verb, decline, fail, lower, weaken) |
| pejorate(verb, decline, weaken, lessen, degenerate) |
| pollute(verb, decline, hurt, harm, spoil) |
| reach depths(verb, expression, decline, weaken, lessen) |
| sap(verb, decline, weaken, lessen, degenerate) |
| shrivel(verb, decline, weaken, lessen, degenerate) |
| sicken(verb, decline, weaken, lessen, degenerate) |
| sink(verb, break, decline, fail, lower) |
| slump(verb, decline, weaken, lessen, degenerate) |
| wane(verb, decline, weaken, lessen, degenerate) |
| weaken(decline, degenerate, deteriorate, decay, disintegrate) |
| atrophy(decline, degenerate, deteriorate, worsen, crumble) |
| become tainted(verb, expression, decay, taint) |
| become useless(verb, expression, decay, taint) |
| go moldy(verb, expression, decay) |