Synonyms and related words :
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