～ないではいられない — Can't Hold Back
Expresses an irrepressible urge to do something — 'cannot help but…' or 'can't resist doing…' It is the more colloquial counterpart of ずにはいられない, conveying that one's feelings drive the action involuntarily.
Structure
[Verb ない-form] + ではいられない
Examples
おいしそうなケーキを見ると、食べないではいられない。
Oishisou na keeki o miru to, tabenai de wa irarenai.
When I see a delicious-looking cake, I can't resist eating it.
食べない + ではいられない = unable to stop myself from eating
困っている人を見たら、助けないではいられない。
Komatte iru hito o mitara, tasukenai de wa irarenai.
When I see someone in trouble, I can't help but help them.
助けない + ではいられない = helping becomes irresistible
あの歌を聞くと、口ずさまないではいられない。
Ano uta o kiku to, kuchizusamanai de wa irarenai.
When I hear that song, I can't help humming along.
口ずさまない + ではいられない = humming is involuntary
• Formed from the plain ない-form + ではいられない. • する → しないではいられない (regular, unlike せず in ずにはいられない). • Slightly more casual than ずにはいられない but the meaning is the same.
Commonly confused with
The JLPT rarely asks whether you recognise a pattern — it asks which of several similar patterns fits. These are the ones ～ないではいられない is tested against.
vs ～ずにはいられない
Same meaning; ないではいられない is the more colloquial form, while ずにはいられない is more literary/formal.
vs ～てしまう
てしまう marks completion or regret about an action; ないではいられない stresses the involuntary compulsion driving one to do it.
More modal expressions
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