怨入骨髓 yuànrùgǔsuǐ to hate to the marrow Origin Definitions Defs Strokes Stroke Words Sentences Sents 怨 yuàn nounverb resentment (bound form) Resentment, hatred, or a grudge; often used in words like 抱怨 bàoyuàn and 怨恨 yuànhèn入 rù verbadjective deeply (bound form) deeply; thoroughly; immersed in something骨髓 gǔsuǐ marrow bone marrow; the soft tissue inside bones that produces blood cells