骨ほねの髄ずいまで

expression

to the core; to the bone; to the marrow

Idiomatic expression meaning thoroughly or completely, often used with verbs like しみ込む, 愛する, or 腐る to emphasize deep penetration or intensity.

• 寒さむさが骨ほねの髄ずいまでしみ込こんだ。