difficult

adj.

[1]	hard , hard , arduous , toilsome , strenuous , tough , laborious , burdensome , onerous , demanding
[2]	puzzling , unmanageable , perplexing , baffling , enigmatic(al) , profound , abstruse , obscure , recondite , complex , thorny , intricate , sensitive , knotty , problematic(al) , ticklish , scabrous
[3]	intractable , recalcitrant , obstructive , stubborn , unmanageable , obstinate , contrary , unaccommodating , refractory , unyielding , uncompromising , naughty , ill-behaved , (Colloq) (Brit) bloody-minded
[4]	troubled , troubling , tough , burdensome , onerous , demanding , trying , hard , grim , dark , unfavourable , straitening
[5]	fussy , particular , demanding , finicky , finical , fastidious , critical , troublesome , difficile , awkward , (Colloq) nit-picking