Synonyms and related words :
Herculean, agitated, all-overish, anxious, anxioused up, apprehensive, arduous, artificial, awkward, backbreaking, biased, bothered, burdensome, chill, chilly, cold, concerned, cooked, cool, crushing, difficult, disaccordant, disquieted, distant, disturbed, doctored, dragged out, drawn, drawn out, effortful, elongated, extended, farfetched, fearful, forced, foreboding, frosty, garbled, grueling, hard-earned, hard-fought, heavy, hefty, icy, improbable, in a pucker, in a stew, incompatible, inhospitable, inimical, insincere, killing, labored, laborious, lengthened, misgiving, misquoted, misrepresented, nervous, on tenterhooks, onerous, operose, oppressive, out-of-the-way, overanxious, overapprehensive, painful, perturbed, perverted, prolongated, prolonged, protracted, pulled, punishing, put-on, quite another thing, remote, self-conscious, slanted, solicitous, something else again, spun out, stiff, straggling, strenuous, stretched, stretched out, stretched tight, strung out, suspenseful, taut, tense, tight, toilsome, tortured, tough, troubled, troublesome, twisted, unamiable, unamicable, uncomfortable, uncordial, under a strain, uneasy, unfriendly, ungenial, unharmonious, unnatural, unrelaxed, unsociable, uphill, uptight, wearisome, zealous