〜ないとも限らない

Formation

N2SuppositionNeutral
ない-Form
Verb
/Noun
とも限らない

Meaning

Used to express that there is a possibility that something might happen, or that it is not absolutely certain that it will not. It suggests a potential outcome or possibility, even if it seems unlikely.

Examples

一生懸命準備しても、失敗しないとも限りません。

Even if you prepare as hard as you can, it's not impossible that you might fail.

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Related Grammar

Conjugation Reference