| sap(verb, reduce, ruin, worry, destroy) |
| weakness(noun, weak, sick, unhealthy, weariness) |
| boredom(noun, melancholy, dullness, apathy, discontent) |
| flag(verb, drop, take, fail, strain) |
| enervation(noun, weak, sick, unhealthy, tiredness) |
| lethargy(noun, melancholy, dullness, apathy, indifference) |
| debilitation(noun, weak, sick, unhealthy, weariness) |
| drowsiness(noun, lethargy, slowness, weariness, stupor) |
| ennui(noun, verb, worry, fail, strain) |
| fag out(verb, expression, phrasal verb) |
| harass(verb, bother, worry, fail, strain) |
| pall(verb, bother, fail, strain, annoy) |
| annoy(verb, bother, worry, fail, strain) |
| burn out(verb, expression, phrasal verb, drop, take) |
| faintness(noun, weak, sick, unhealthy, weariness) |
| feebleness(noun, weak, sick, unhealthy, weariness) |
| irk(verb, bother, worry, fail, strain) |
| listlessness(noun, melancholy, dullness, apathy, indifference) |
| poop(noun, verb, take, weaken, exhaust) |
| sleepiness(noun, weariness, stupor, tiredness, torpor) |