| decrease(verb, drop, fall, fail, diminish) |
| degrade(verb, decline, weaken, degenerate, deteriorate) |
| deprave(verb, decline, weaken, degenerate, deteriorate) |
| descend(verb, decline, weaken, degenerate, deteriorate) |
| diminish(verb, drop, fall, fail, return) |
| disimprove(verb, drop, decline, fall, fail) |
| faint |
| fall apart(verb, expression, decline, weaken, degenerate) |
| fall away |
| fizzle out |
| give out |
| give way |
| go off |
| go to pot(verb, expression, idiom, drop, decline) |
| impair(verb, decline, weaken, degenerate, deteriorate) |
| injure(verb, decline, weaken, degenerate, deteriorate) |
| lose it(verb, expression, phrasal verb, decline, fail) |
| lose quality(verb, expression, decline, fail, lower) |
| lose value(verb, expression, drop, decline, fall) |
| lower(verb, drop, decline, fall, fail) |