| weaken(verb, upset, dull, quiet, strong) |
| enervate(verb, upset, trouble, dull, strong) |
| debilitate(verb, upset, dull, strong, decline) |
| sap(verb, upset, dull, strong, decline) |
| enfeeble(verb, strong, weak, weaken, lessen) |
| undermine(verb, strong, decline, reduce, fail) |
| deaden(verb, dull, quiet, destroy, diminish) |
| exhaust(verb, dull, quiet, decline, reduce) |
| cripple(verb, decline, reduce, fail, halt) |
| attenuate(verb, strong, weaken, lessen, drain) |
| dampen(verb, upset, trouble, dull, quiet) |
| destroy(verb, dull, quiet, diminish, weaken) |
| devitalise |
| drain(verb, upset, trouble, dull, remove) |
| emasculate(verb, destroy, diminish, weaken, deprive) |
| eviscerate(verb, destroy, diminish, weaken, disable) |
| demoralize(verb, discourage, sadden, dishearten, dispirit) |
| depress(verb, dull, quiet, decline, reduce) |
| desiccate(verb, take, diminish) |
| disable(verb, weaken, drain, undermine, enervate) |