Shirabe
大往生 を 遂げる
English jmdict
1
expressions (phrasesIchidan verb to die peacefully;to have lived a full life
少年少女と呼ぶべき年齢の者から、近く大往生を遂げるのではないかという老齢の者の姿まである。
There were figures there from those of an age best called girls and boys to those who looked to be old enough to be about to live out their life span.

遂げるとげる

Common Ichidan Transitive
English jmdict
1
Ichidan verbtransitive verb to accomplish;to achieve;to carry out
浪士は本懐を遂げた。
The rōnin attained their long-cherished ambition.
2
Ichidan verbtransitive verb to arrive at (a certain outcome);to come to;to end with