病膏肓に入る やまいこうこうにいる Also written やまいこうもうにいる Meanings Expression, Godan verb to become seriously ill; to catch an incurable illness to become a slave of a habit Kanji 病 illness. Read as やまい. 膏 fat; grease; lard. Read as コウ. 肓 interior region of the body too deep to be reached by acupuncture. Read as コウ. 入 enter. Read as いる. Jinuma: Japanese Dictionary · Word lists