boredom, taedium vitae, the knowledge of maya, absurdity, weltschmerz, mal du siecle, existential nausea, dysphoria, doldrums, the funk, malaise, ennui, hebephrenia, discouragement, depression, melancholia, anomie, accidie, dysthymia, blankness, lack of affect, the blues, despair, the black dog, black ass, hopelessness, sorrow, grief, unhappiness, Hikikomori, alienation, withdrawal, tristitia, nihilism, morbidity, anhedonia, wretchedness, anxiety, fear, pain, terror, horror, desolation, postcentennial hypochondria, Älterschmerz, thanatropism, fear of death, death wish