• 遺産いさん — inheritance / heritage
• 遺書いしょ — written will / farewell note
• 遺言ゆいごん — will / testament
• 遺族いぞく — surviving family
• 遺品いひん — belongings of the deceased
• 遺跡いせき — historical ruins

遺 combines the movement radical 辶 with 貴 (precious), suggesting “something precious left as one moves on.” It often appears in legal or cultural vocabulary about legacy and remembrance.

父ちちの 遺言ゆいごんを 守まもって 生いきていきます。
I will live by my father's will.

その遺産いさんは 世界せかいの 文化ぶんか 遺産いさんに 登録とうろくされた。
That heritage was registered as a World Cultural Heritage.