(n.) The state of being tired, or weary.

acedia aloofness angst anguish anxiety apathy boredness carelessness cheerlessness detachment discomfort discomposure discontent disgust disinterest disinterestedness dislike dispiritedness displeasure disquiet dissatisfaction distaste doldrums dread dreariness drowsiness dullness emptiness enervation ennui existential woe fatigue fed-upness flatness grimness heaviness hebetude heedlessness impassiveness impassivity inanimation incuriosity incuriousness indifference indifferentism indifferentness inquietude insouciance intellectual inertia jadedness joylessness lack of interest lack of pleasure lackadaisicalness languidness languishment languor languorousness lassitude lenitude lentor lethargy life-weariness lifelessness listlessness malaise melancholy monotony nausea nongratification nonsatisfaction oscitancy painfulness passivity phlegm regardlessness satedness satiation satiety savorlessness sleepiness sloth slothfulness slowness sluggishness somnolence spleen staleness stolidity stupefaction stupor supineness taedium vitae tastelessness tediousness tedium tiredness torpidity torpidness torpitude torpor uncomfortableness unconcern unease uneasiness unhappiness uninquisitiveness uninterestedness unmindfulness unpleasure unsatisfaction vexation of spirit wearifulness weariness withdrawal world-weariness yawn