gloomy, downcast, downhearted, dejected, disconsolate, dispirited, despondent, crestfallen, cast down, depressed, disappointed, disheartened, discouraged, demoralized, desolate, heavy-hearted, in low spirits, low-spirited, sad, unhappy, doleful, melancholy, miserable, woebegone, mournful, forlorn, long-faced, fed up, in the doldrums, wretched, lugubrious, morose, sepulchral, saturnine, dour, mirthless

informal blue, down, down in the mouth, down in the dumps

British informal brassed off, cheesed off, looking as if one had lost a pound and found a penny

literary dolorous

archaic chap-fallen, adust