| kink(noun, weakness, crack, fault, blemish) |
| limitation(noun, trouble, difficulty, weakness, bar) |
| moribund |
| overlooking(noun, verb, slip, breach, lapse) |
| overthrow(noun, decline, ruin, defeat, collapse) |
| peccadillo(noun, weakness, flaw, defect, refinement) |
| rout(noun, decline, ruin, defeat, collapse) |
| run-down |
| scant(adjective, light, poor, short, shy) |
| senile |
| sick(adjective, weak, ill, feeble, confused) |
| sketchy(poor, short, insufficient, scarce, lacking) |
| slip(noun, drop, fall, wrong, weakness) |
| stain(noun, weakness, crack, fault, blemish) |
| taint(noun, weakness, crack, fault, blemish) |
| unfortunate |
| washout(noun, decline, ruin, defeat, collapse) |
| weak side(noun, expression, idiom, weakness, vice) |
| aborting |
| bad habit(expression, weakness, fault, shortcoming) |