〜ずにはいられない zu ni wa irarenai
〜ずにはいられない（zu ni wa irarenai）means “can't help but … / can't stop oneself from …”. Expresses that one cannot suppress an action or emotion — it comes out naturally despite oneself. Formation: V-ない（ないを取る）+ ずにはいられない ／ する → せずにはいられない
can't help but … / can't stop oneself from …
N2Formation
V-ない（ないを取る）+ ずにはいられない ／ する → せずにはいられない
Explanation
Expresses that one cannot suppress an action or emotion — it comes out naturally despite oneself. It conveys a strong, almost involuntary urge that cannot be resisted.
Examples
Note
Describes the speaker's own irresistible urge; sounds unnatural for a plain third-person statement of fact. する becomes せずにはいられない. A more colloquial equivalent is 〜ないではいられない.
FAQ
〜ずにはいられない — what does it mean and how is it used?
can't help but … / can't stop oneself from …. Expresses that one cannot suppress an action or emotion — it comes out naturally despite oneself. It conveys a strong, almost involuntary urge that cannot be resisted.
〜ずにはいられない — how do you form it?
V-ない（ないを取る）+ ずにはいられない ／ する → せずにはいられない
〜ずにはいられない — any usage notes?
Describes the speaker's own irresistible urge; sounds unnatural for a plain third-person statement of fact. する becomes せずにはいられない. A more colloquial equivalent is 〜ないではいられない.