| go to seed(verb, expression, idiom, decline, weaken) |
| go to the dogs(verb, expression, idiom, decline, fail) |
| hit rock bottom(verb, expression, idiom, decline, weaken) |
| mildew(verb, decline, weaken, lessen, degenerate) |
| mold(verb, decline, weaken, lessen, degenerate) |
| mortify(verb, decline, weaken, lessen, degenerate) |
| pejorate(verb, decline, weaken, lessen, degenerate) |
| pollute(verb, break, decline, hurt, ruin) |
| putrefy(verb, decline, weaken, lessen, degenerate) |
| putresce(verb, decline, weaken, lessen, degenerate) |
| reach depths(verb, expression, decline, weaken, lessen) |
| sap(verb, decline, weaken, lessen, degenerate) |
| shrivel(verb, drop, cut, decline, reduce) |
| sicken(verb, decline, weaken, lessen, degenerate) |
| slump(verb, drop, cut, decline, reduce) |
| soften(verb, drop, quiet, cut, decline) |
| spoil(verb, break, decline, hurt, ruin) |
| suppurate(verb, decline, weaken, lessen, degenerate) |
| turn(verb, decline, weaken, lessen, degenerate) |
| undermine(verb, break, decline, hurt, ruin) |