肓interior region of the body too deep to be reached by acupunctureStrokes7OnコウParts亡deceased月monthWords with 肓膏肓こうこう · koukouinnermost part of the body (where a disease cannot be treated)病膏肓に入るやまいこうこうにいる · yamaikoukouniiruto become seriously ill; to catch an incurable illness; to become a slave of a habitStudy it in Yanamino