difficult
I
adjective
arduous, attended by obstacles, awkward, beset with difficulty, beyond one's reach, bothersome, burdensome, complex, complicated, convoluted, difficile, difficilis, encompassed with difficulties, enigmatic, entangled by difficulties, fatiguing, grueling, hard, hard to deal with, hard to manage, hard to understand, impassable, impeditus, impenetrable, incomprehensible, insoluble, insurmountable, intractable, involved, labored, laborious, labyrinthine, obscure, obstinate, offering a problem, operose, out of reach, painstaking, perplexing, perverse, problematic, puzzling, recondite, refractory, strenuous, stubborn, surrounded by difficulties, too hard, troublesome, unachievable, unapproachable, unavailable, uncertain, unclear
associated concepts: difficult and extraordinary action, difficult and extraordinary case or proceeding
II
index
complex, elusive, formidable, fractious, froward, impracticable, insuperable, intricate, labyrinthine, lawless, obscure (abstruse), onerous, opaque, operose, oppressive, painful, perverse, petulant, problematic, querulous, recondite, restive, severe, uncompromising
Burton's Legal Thesaurus.
William C. Burton.
2006