末すえ始し終じゅう

adverb, noun

forever; for life; for the rest of one's life

Emphasizes continuity from now until the very end; often used in promises or declarations about lifelong commitment.

• 彼かの女じょは末すえ始し終じゅう彼かれを愛あいすると誓ちかった。

  She vowed to love him for the rest of her life.

• この恩おんは末すえ始し終じゅう忘わすれません。

  I will never forget this kindness for as long as I live.