絶たえることなく

adverb

unceasingly; relentlessly; without interruption

Used to describe an action or state that continues without stopping. Often found in literary or formal contexts.

• 彼かれは絶たえることなく努ど力りょくを続つづけた。

  He continued his efforts unceasingly.

• 絶たえることなく雨あめが降ふり続つづいている。

  The rain has been falling relentlessly.