| depreciate(decline, weaken, lessen, degenerate, deteriorate) |
| deteriorate(verb, decline, weaken, lessen, degenerate) |
| determine |
| discolor(verb, decline, weaken, lessen, degenerate) |
| dissolve(verb, decline, weaken, lessen, degenerate) |
| dry-rot(decline, weaken, lessen, degenerate, deteriorate) |
| dwindle(decline, weaken, lessen, degenerate, deteriorate) |
| fade(verb, decline, weaken, lessen, degenerate) |
| fail(decline, weaken, lessen, degenerate, deteriorate) |
| fester(disintegrate, rot, decompose, molder) |
| forge |
| get worse(expression, decline, weaken, lessen, degenerate) |
| go to seed(expression, idiom, decline, weaken, lessen) |
| 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) |
| molding |
| moulder |
| pejorate(decline, weaken, lessen, degenerate, deteriorate) |