| fall apart(verb, expression, phrasal verb, decline, degenerate) |
| decline(verb, break, separate, fail, lower) |
| degenerate(verb, break, beat, decline, crush) |
| mildew(verb, decline, weaken, lessen, degenerate) |
| suppurate(verb, decline, weaken, lessen, degenerate) |
| waste away(verb, expression, phrasal verb, decline, separate) |
| collapse(verb, break, beat, decline, crush) |
| curdle(verb, dull, decline, spoil, weaken) |
| fade(verb, decline, separate, fail, lower) |
| fail(verb, decline, lower, weaken, lessen) |
| go to seed(verb, expression, idiom, decline, weaken) |
| mold(verb, decline, weaken, lessen, degenerate) |
| wear away(verb, expression, decline, hurt, reduce) |
| addle(verb, decay, taint, putrefy) |
| be impaired(verb, decline, weaken, lessen, degenerate) |
| become contaminated(verb, expression, decline, weaken, lessen) |
| defile(verb, decline, hurt, ruin, harm) |
| depreciate(verb, decline, ruin, fail, lower) |
| discolor(verb, decline, hurt, harm, spoil) |
| dry-rot(verb, decline, weaken, lessen, degenerate) |