天寿てんじゅを全まっとうする

expression, suru verb (irregular)

die a natural death at an advanced age; live out one's allotted lifespan

Idiomatic expression used when someone dies peacefully after living a full life, without accident or illness cutting it short. Often used in obituaries or respectful descriptions of a long life well lived.

• 祖そ母ぼは九きゅう十じゅっ歳さいで天てん寿じゅを全まっとうした。

  My grandmother lived out her natural lifespan and passed away at ninety.

• 彼かれは長ながい闘とう病びょうの末すえ、天てん寿じゅを全まっとうするように静しずかに息いきを引ひき取とった。

  After a long illness, he passed away peacefully as if having completed his allotted years.