| fail(decline, weaken, lessen, degenerate, deteriorate) |
| get worse(expression, decline, weaken, lessen, degenerate) |
| go to seed(verb, expression, idiom, decline, weaken) |
| go to the dogs(expression, idiom, decline, weaken, lessen) |
| hit rock bottom(expression, idiom, decline, weaken, lessen) |
| hit the skids(expression, idiom, decline, weaken, lessen) |
| lessen(verb, decline, weaken, degenerate, deteriorate) |
| pejorate(decline, weaken, lessen, degenerate, deteriorate) |
| 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) |
| stink(verb, uncleanness) |
| waste away(expression, decline, weaken, lessen, stain) |
| wear away(expression, decline, weaken, lessen, degenerate) |
| go moldy(verb, expression, idiom, decay) |
| grow moldy(expression, idiom, decompose, molder) |
| weaken(decline, degenerate, deteriorate, worsen, crumble) |
| become tainted(verb, expression, decay, taint) |
| become useless(verb, expression, decay, taint) |