nightmarish, terrifying, torturous, harrowing, horrific, unendurable, horrifying, miserable, horrendous, wretched, horrible, infernal, hellacious, terrible, purgatorial, brutal, horrid, ghastly, hideous, unbearable, dantean, dreadful, dank, kafkaesque, excruciating, frightening, squalid, godforsaken, perilous, dreary, dantesque, chaotic, apocalyptic, savage, tortuous, grimmest, frightful, monstrous, unpleasant, claustrophobic, surreal, petrifying, desolate, unspeakable, murderous, deathly, unforgiving, treacherous, merciless, darkest, agonizing, diabolical, joyless, sadistic, eerie, blissful, stygian, fetid, hopeless, gruesome, grimy, atrocious, inhospitable, appalling, disorienting, grisly, drear, bleak, comfortless, oppressive, nauseating, hallucinatory, scariest, unmerciful, charnel house, depressing, filthy, pitiless, stormy, wintry, abominable, harsh, bearable, phantasmagoric, intolerable, grueling, cruel, dankest, unimaginable, eldritch, nasty, fearsome, sisyphean, bizarre, chilling, stultifying, bewildering, pestilential, roughest, subzero, hieronymus bosch, keen, rude, chancy, fair, fond, hard, heartless, hot, inhuman, manipulative, pagan, paranoid, petty, quick, robbing, scurvy, sensible, smart, fiendish, unholy, devilish, frustrating, demoniac, demoralizing, racking, beastly, dismal, hectic

stygian

beastly, demonic, diabolic, diabolical, evil, fiendish, infernal, satanic, unholy, unpleasant, wicked