Synonyms of dismal

1 Syllable
drear, sad, dim, gaunt, glum, dark, dour, black, dull, dun, drab
2 Syllables
joyless, saddest, tedious, adusk, twilit, moody, glummer, smoggiest, dourer, dingy, cloudier, gaunter, sulky, mopey, mirthless, doomful, hiemal, dusky, broody, sunless, roily, cloudy, drearier, duner, boring, dreary, cheerless, gloomier, sullen, brumal, horrid, cloudiest, murkier, let-down, murky, pouty, ruthful, sadder, moodier, wintrier, frowning, duskier, ghastly, somber, drabbest, grievous, drabber, subfusc, forlorn, smoggy, morbid, wintry, gauntest, gloomy
3 Syllables
despondent, pitiful, gruesome, dirgeful, funereal, nubilous, chapfallen, pitiable, hibernal, unhappiest, ominous, shadowy, horrible, overcast, ungenial, unhappy, depressing, sepulchral, lugubrious, doleful, dolorous, depressed, heart-rending, lowering, sourpussed, tenebrous, icebox, splenetic, unhappier, sorrowful, dejected, hopeless
4 Syllables
disagreeable, troublesome, melancholy, down-in-the-mouth, woebegone, oppressive, malificent, precursive, depressive, godforsaken, overclouded, drearisome, emulsified, dispiriting, discouraging, disheartening, afflictive, dirgelike, acheronian, acherontic, tenebrific, lonesome, inauspicious, desolate, monotonous, unenjoyable, miserable
5 Syllables
premonitory, superincumbent, unfortunate, uninteresting, unentertaining