Difficult1. (a.) Hard to do or to make; beset with difficulty; attended with labor, trouble, or pains; not easy; arduous.
2. (a.) Hard to manage or to please; not easily wrought upon; austere; stubborn; as, a difficult person.
3. (v. t.) To render difficult; to impede; to perplex.
Thesaurus Entries
Herculean, abstruse, adverse, antagonistic, arduous, awkward, baffling, beyond one, bloody-minded, brutal, burdensome, cantankerous, complex, complicated, conflicting, contrary, counter, counteractive, crabbed, cramp, critical, cross-grained, dark, delicate, demanding, detrimental, difficile, effortful, enigmatical, exacting, fastidious, finical, finicking, finicky, finikin, formidable, froward, fuss-budgety, fussy, garbled, grim, hairy, hard, hard to please, hard to understand, hard-earned, hard-fought, harmful, hostile, ill-behaved, in opposition, inimical, intractable, intricate, irascible, jawbreaking, jumbled, knotted, knotty, labored, laborious, mean, miserable, naughty, nit-picking, no picnic, not easy, obfuscated, obscure, obscured, obstinate, obstructive, onerous, operose, opposed, opposing, opposite, ornery, overtechnical, particular, pawky, pernickety, perplexed, perplexing, persnickety, perverse, problem, problematic, problematical, profound, puzzling, queasy, recalcitrant, recondite, refractory, rigorous, rough, rugged, scabrous, scrambled, sensitive, set with thorns, severe, sinister, spiny, squeamish, steep, strenuous, stressful, stubborn, stuffy, sulky, sullen, thorny, ticklish, toilsome, tough, tricky, troubled, troublesome, troubling, troublous, trying, unaccommodating, uncompromising, unfavorable, unmanageable, untoward, unyielding, uphill, wayward, wicked, wretched, wrongheaded