| give a bad name(expression, idiom, hurt, damage, dirty) |
| go downhill(verb, expression, decline, reduce, fail) |
| go to pieces(expression, idiom, decline, degenerate, deteriorate) |
| go to pot(verb, expression, idiom, decline, fail) |
| go to the dogs(expression, idiom, decline, degenerate, deteriorate) |
| harass |
| hex |
| hit the skids(expression, idiom, decline, weaken, degenerate) |
| hose(verb, harm, corrupt, impair, persecute) |
| humiliate(verb, reduce, destroy, damage, lower) |
| ill-treat(verb, ruin, harm, corrupt, impair) |
| jinx |
| languish(decline, weaken, degenerate, deteriorate, decay) |
| lapse(noun, decline, reduce, weaken, lessen) |
| lead astray(verb, expression, idiom, ruin, spoil) |
| lessen(verb, decline, reduce, destroy, fail) |
| lose it(expression, decline, weaken, degenerate, degrade) |
| lose quality(expression, decline, weaken, degenerate, degrade) |
| lure(ruin, corrupt, degrade, debase, taint) |
| malign |