Grammar Info
N1 Lesson 10: 8/12
ずにはおかない ずにはおかない will definitely, will certainly, bound to, not fail to also used to express that subject (usually non-animate like a book) has an emotional effect on people,
Structure
Verb [ない-stem] + ずには + おかない
Verb [ない] + では + おかない
Exception:

する→せずにはおかない
Verb [Negative] + では + おかない
Details
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使用域 タメ語
Information
  • (A) ずにはおかない is a phrase used when a subject (person or organization, usually speaker herself/himself) has a strong resolution to exert influence over someone. Often used with the causative form, adverbs like きっと, 絶対に or 必ず can be added for emphasis.
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《小説(しょうせつ)、勇者(ゆうしゃ)》「どんな手段(しゅだん)を用(もち)いても、かならず魔王(まおう)を倒(たお)さずにはおかない。」
Novel: "No matter what it takes, I will not fail to defeat the Demon Lord!"
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