Difficult

Synonyms Hard, arduous, heavy, onerous, demanding, gruelling, back-breaking, exhausting, fatiguing, wearying, hellish, knackering, exigent, puzzling, perplexing, mystifying, complicated, involved, knotty, ticklish, abstract, recondite, impenetrable, over one's head, beyond one, sticky, gnarly, involute, strenuous, laborious, tough, burdensome, punishing, grinding, painful, tiring, wearing, wearisome, killing, toilsome, problematic, baffling, confusing, mysterious, complex, intricate, thorny, obscure, abstruse, enigmatic, unfathomable, above one's head, fiddly, no picnic, wildering, and involuted.

Synonyms Inconvenient, unfavourable, inappropriate, untimely, inopportune, disadvantageous, bad, grim, awful, nightmarish, black, adverse, unwelcome, distressing, straitened, direful, awkward, unfortunate, unsuitable, ill-timed, inexpedient, unseasonable, tough, terrible, dreadful, dark, hard, unpleasant, disagreeable, harrowing, hard-pressed, and parlous.

Synonyms Troublesome, trying, demanding, intractable, contrary, obstreperous, fractious, unhelpful, unamenable, disobliging, obstinate, pig-headed, hard to satisfy, particular, fastidious, critical, finicky, thrawn, choosy, bloody-minded, stroppy, contumacious, contrarious, tiresome, exasperating, unmanageable, perverse, recalcitrant, refractory, unaccommodating, uncooperative, unreasonable, stubborn, bull-headed, hard to please, fussy, over-particular, perfectionist, hypercritical, awkward, cussed, picky, bolshie, balky, froward, and finical.