Kanji Library
Grammar › Compulsion & Restraint

ずにはいられない — “can't help but do, can't resist doing”

JLPT N2 Compulsion & Restraint

Says an urge is so strong that holding back from acting on it is impossible

Verb's negative-stem (nai-form minus ない) + ずにはいられない says an impulse or emotion is so strong that the speaker (or subject) cannot stop themselves from acting on it — “can't help but do X.” する becomes the irregular せずにはいられない, matching the same pattern as ざるを得ない.

How to form it

PatternExample
Nai-stem + ずにはいられない笑わずにはいられなかった — I couldn't help but laugh

Example sentences

JapaneseReadingMeaning
そのはなしをきいて、なみだをながさずにはいられなかった。
sonohanashiwokiite、namidawonagasazunihairarenakatta。
Hearing that story, I couldn't help but cry.
あまりのおいしさに、もうひとくちたべずにはいられない。
amarinooishisani、mouhitokuchitabezunihairarenai。
It was so delicious I couldn't resist another bite.
かれのまちがいをしてきせずにはいられなかった。
karenomachigaiwoshitekisezunihairarenakatta。
I couldn't help but point out his mistake.

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Watch out

ずにはいられない is about an internal emotional or physical urge overpowering self-control — it's not about external circumstances forcing an action, which is what ざるを得ない (no real choice given the situation) covers instead.

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