| go to the dogs(expression, idiom, decline, degenerate, deteriorate) |
| hit the skids(expression, idiom, decline, weaken, degenerate) |
| impair(decline, weaken, degenerate, deteriorate, degrade) |
| injure(decline, weaken, degenerate, deteriorate, degrade) |
| keel over(verb, expression, break, drop, give) |
| lapse(decline, weaken, degenerate, deteriorate, decay) |
| lessen(decline, weaken, degenerate, deteriorate, decay) |
| lose it(expression, decline, crack, degenerate, degrade) |
| lose quality(expression, decline, weaken, degenerate, degrade) |
| lower(decline, weaken, degenerate, deteriorate, decay) |
| mar(decline, weaken, degenerate, deteriorate, degrade) |
| part(verb, divide, fragment, disintegrate) |
| pervert(decline, weaken, degenerate, deteriorate, degrade) |
| regress(decline, weaken, degenerate, deteriorate, degrade) |
| retrograde(decline, weaken, degenerate, deteriorate, decay) |
| retrogress(decline, weaken, degenerate, deteriorate, degrade) |
| rot(verb, decline, weaken, degenerate, deteriorate) |
| sink(decline, weaken, degenerate, deteriorate, decay) |
| skid(decline, weaken, degenerate, deteriorate, degrade) |
| slide(decline, weaken, degenerate, deteriorate, decay) |