Synonyms and related words :
Herculean, absolute, absolutist, absolutistic, agonizing, airless, annoying, arbitrary, arduous, aristocratic, arrogant, authoritarian, authoritative, autocratic, backbreaking, besetting, black, bleak, bossy, bothersome, breathless, breezeless, brutal, burdensome, close, crushing, cumbersome, cumbrous, demanding, depressant, depressing, depressive, despotic, dictatorial, discouraging, disheartening, dismal, dispiriting, distressing, dolorous, domineering, down, effortful, encumbering, exacting, exhausting, exigent, feudal, forced, grievous, grinding, grueling, hampering, hard-earned, hard-fought, harrowing, harsh, heavy, hefty, high-handed, humid, ill-ventilated, impedimental, impeding, impeditive, imperative, imperial, imperious, incumbent, intolerable, irksome, killing, labored, laborious, lordly, lumpish, magisterial, magistral, massive, masterful, miserable, monocratic, muggy, onerous, operose, overbearing, overburdensome, overpowering, overruling, overwhelming, painful, peremptory, plaguey, punishing, racking, repressive, severe, somber, sticky, stifling, strained, strenuous, strict, stuffy, suffocating, sultry, superincumbent, suppressive, taxing, toilsome, tough, troublesome, trying, tyrannical, tyrannous, unbearable, uncomfortable, unendurable, unvented, unventilated, unwieldy, uphill, vexatious, wearing, wearisome, wearying, weighty, windless, wretched