(n.) A feeling of weariness and disgust; dullness and languor of spirits, arising from satiety or want of interest; tedium.

acedia angst anguish anxiety apathy blues boredness boredom cheerlessness dejection depression discomfort discomposure discontent dislike dispiritedness displeasure disquiet dissatisfaction doldrums dread drowsiness dullness dumps emptiness enervation existential woe fatigue fed-upness flatness grimness heaviness hebetude inanimation indifference inquietude jadedness joylessness lack of pleasure lackadaisicalness languidness languishment languor languorousness lassitude lenitude lentor lethargy life-weariness lifelessness listlessness malaise melancholy nausea nongratification nonsatisfaction oscitancy painfulness pall passivity phlegm sadness satedness satiation satiety savorlessness sleepiness sloth slothfulness slowness sluggishness somnolence spiritlessness spleen staleness stupefaction stupor supineness surfeit taedium vitae tastelessness tediousness tedium tire tiredness torpidity torpidness torpitude torpor uncomfortableness unease uneasiness unhappiness unpleasure unsatisfaction vexation of spirit wearifulness weariness weary world-weariness yawn