難なん治ち性せいMeaningsNoun1. refractority (of a disease); intractability; difficulty to cureKanji used難difficult治rein in性nature (of a person)Composed of難なん治ちintractable (diseases); hard to cure; rebellious; insurgent; refractory; obstinateNoun性せいnature (of a person); sex; gender; sex (i.e. sexual attraction, activity, etc.); -ty; -ity; -ness; -cyNoun