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adjective
hard on someone; hard to do
Synonyms: ambitious, arduous, backbreaker, bothersome, burdensome, challenging, crucial, demanding, difficile, easier said than done, effortful, exacting, formidable, galling, Gargantuan, hard-won, heavy, Herculean, immense, intricate, irritating, labored, laborious, no picnic, not easy, onerous, operose, painful, problem, problematic, prohibitive, rigid, severe, stiff, strenuous, titanic, toilsome, tough, troublesome, trying, unyielding, uphill, upstream, wearisome
Antonyms: calm, easy, free, manageable, plain, simple, uncomplicated
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adjective
complicated; hard to comprehend
Synonyms: abstract, abstruse, baffling, bewildering, complex, confounding, confusing, dark, deep, delicate, enigmatic, enigmatical, entangled, esoteric, formidable, hard to explain, hard to solve, hidden, inexplicable, intricate, involved, knotty, labyrinthine, loose, meandering, mysterious, mystical, mystifying, nice, obscure, obstinate, paradoxical, perplexing, problematical, profound, puzzling, rambling, subtle, tangled, thorny, ticklish, troublesome, unclear, unfathomable, unintelligible, vexing
Antonyms: easy, simple, straightforward, uncomplicated
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adjective
unmanageable socially
Synonyms: argumentative, bearish, boorish, dark, demanding, fastidious, finicky, fractious, fussy, grim, hard to please, impolite, intractable, irritable, oafish, obstreperous, perverse, picky, refractory, rigid, rude, tiresome, tough, troublesome, trying, unaccommodating, unamenable
Antonyms: calm, friendly, sociable