Grammar › N2 · 10 Emphasis and attitude
〜ずにはいられない: can't help doing
N2 · 10 Emphasis and attitude
Says you cannot stop yourself from doing something.
Verb ない-form (without ない) + ずにはいられない; する becomes せずにはいられない. The spoken form is 〜ないではいられない. It is about an action coming out of your feelings. Don't use it for physical states.
Examples
かわいい子犬を見ると、つい声をかけずにはいられない。
When I see a cute puppy, I can't help talking to it.
この話を聞いたら、笑わずにはいられないよ。
If you hear this story, you can't help laughing.