| gnaw at |
| go bad(verb, expression, stop, end, decline) |
| go to seed(verb, expression, idiom, decline, weaken) |
| go to the dogs(verb, expression, idiom, decline, fail) |
| gobble up |
| graze(verb, rub, grind, scrape, fray) |
| hit rock bottom(verb, expression, idiom, decline, weaken) |
| languish(decline, weaken, degenerate, deteriorate, decay) |
| lighten(verb, drop, quiet, cut, decline) |
| lose edge(verb, expression, drop, cut, decline) |
| lower(verb, drop, cut, decline, reduce) |
| melt |
| melt away(verb, expression, phrasal verb, stop, end) |
| mildew(verb, decline, weaken, lessen, degenerate) |
| modify(verb, drop, quiet, cut, decline) |
| mold(verb, decline, weaken, lessen, degenerate) |
| mortify(verb, decline, weaken, lessen, degenerate) |
| narrow down(verb, expression, phrasal verb, drop, cut) |
| pass(verb, stop, end, fall, fail) |
| pejorate(verb, decline, weaken, lessen, degenerate) |