will inevitably; won't leave it without

ずにはおかない means that something will definitely happen or be made to happen, without fail. Attach ずにはおかない to a verb's ない-stem (する becomes せずにはおかない). It expresses strong inevitability or determination.

Examples

• この映画えいがは見みる者ものを感動かんどうさせずにはおかない。

  Kono eiga wa miru mono o kandou sasezu ni wa okanai.

  This film cannot fail to move those who watch it.

• 真相しんそうを明あきらかにせずにはおかない。

  Shinsou o akiraka ni sezu ni wa okanai.

  I will not rest until the truth is made clear.

Vocabulary in these examples

• この this (+ noun)
• 映画 movie
• 見る to see; to watch
• 感動 being moved, deep emotion
• する to do
• 明らか clear, obvious

Related patterns · Inevitability and compulsion

• 〜を余儀なくされる be forced to; have no choice but
• 〜を禁じ得ない cannot help but feel
• 〜てやまない can't stop; sincerely (do)
• 〜べく in order to
• 〜んがため in order to; for the sake of