black, bleak, cheerless, chill, cloudy, cold, comfortless, dark, darkening, depressing, depressive, desolate, dire, disconsolate, dismal, drear, dreary, dreich(chiefly Scottish), elegiac(also elegiacal), forlorn, funereal, gloomy, glum, godforsaken, gray(also grey), lonely, lonesome, lugubrious, miserable, morbid, morose, murky, plutonian, saturnine, sepulchral, solemn, somber(or sombre), sullen, sunless, tenebrific, tenebrous, wretched

blue, dejected, depressed, despondent, down, droopy, hangdog, inconsolable, low, melancholic, melancholy, mirthless, sad, unhappy, woebegone, woefuldim, discomfiting, discouraging, disheartening, dismaying, dispiriting, distressful, distressing, upsettingdesperate, hopeless, pessimisticlamentable, mournful, plaintive, sorrowfulcolorless, drab, dulldour, grim, lowering(also louring), lowery(also loury), menacing, negative, oppressive, threatening