末始終 (sueshijuu) Japanese meaning: forever | Kotomoraた
。
She vowed to love him for the rest of her life.
I will never forget this kindness for as long as I live.
Etymology
Compound of 末 (すえ, 'end') + 始終 (しじゅう, 'from beginning to end'). The combination reinforces the idea of 'from now until the very end'.