| impair(quell, bollix, flubbed) |
| impoverish(verb, destroy, spoil, cancel, invalidate) |
| injure(verb, destroy, spoil, cancel, invalidate) |
| invalidate(verb, destroy, spoil, cancel, negate) |
| knock down(verb, expression, destroy, level, demolish) |
| lay waste(verb, expression, destroy, level, demolish) |
| lose strength(expression, quell, bollix, flubbed) |
| make hash of(expression, idiom, quell, bollix, flubbed) |
| make useless(expression, quell, bollix, flubbed) |
| muck up(expression, quell, bollix, flubbed) |
| mucked up(expression, quell, bollix, flubbed) |
| negate(verb, destroy, spoil, cancel, invalidate) |
| neutralize(verb, destroy, spoil, cancel, invalidate) |
| nullify(verb, destroy, spoil, cancel, invalidate) |
| offset(verb, destroy, spoil, cancel, invalidate) |
| outfox(verb, destroy, spoil, cancel, invalidate) |
| outmaneuver(verb, destroy, spoil, cancel, invalidate) |
| outsmart(verb, destroy, spoil, cancel, invalidate) |
| overreach(verb, destroy, spoil, cancel, invalidate) |
| play off(expression, quell, bollix, flubbed) |