| devour |
| disable(verb, hurt, ruin, destroy, blow) |
| discolor(verb, break, dull, decline, hurt) |
| disorganize |
| dry-rot(verb, decline, weaken, lessen, degenerate) |
| eat up(verb, expression, phrasal verb) |
| enfeeble(verb, hurt, ruin, destroy, blow) |
| exhaust(verb, decline, blow, use, lose) |
| fail(verb, decline, lower, weaken, lessen) |
| fall(reduce, deteriorate, worsen) |
| fall off(verb, expression, reduce, slip, lapse) |
| fester(verb, decay, rot, decompose, molder) |
| gall(verb, decline, diminish, use, weary) |
| get worse(expression, decline, weaken, lessen, degenerate) |
| go bad(verb, expression, decline, weaken, lessen) |
| go to seed(verb, expression, idiom, decline, use) |
| go to the dogs(verb, expression, idiom, decline, reduce) |
| harm(dull, spoil, injure, stain, discolor) |
| hit rock bottom(expression, idiom, decline, weaken, lessen) |
| hit the skids(verb, expression, idiom, decline, fail) |