Meaning of DIFFICULT in English
adj. 1 a needing much effort or skill. b troublesome, perplexing. 2 (of a person): a not easy to please or satisfy. b uncooperative, troublesome. 3 characterized by hardships or problems (a difficult period in his life). difficultly adv. difficultness n.
[ ME, back-form. f. DIFFICULTY ]
Concise Oxford English dictionary. Краткий оксфордский словарь английского языка. 2012