日本語道場 — Nihongo Dojo

～てはいられない

～te wa irarenai

can't just sit around and

When to use it

Use ～てはいられない when a situation is too urgent or too serious to allow you to remain in the current state — you can't afford to keep waiting, watching, or staying calm. It expresses the speaker's judgment that inaction is no longer an option, so it often appears in reports and meetings to justify immediate action. Stronger and more emotive than ～わけにはいかない, which is about permissibility rather than urgency.

Formation

Verbs: て-form + はいられない → 待ってはいられない、黙ってはいられない。Polite: ～てはいられません／～てはいられなくなる ("reach the point of no longer being able to…")
Contraction: ～ちゃいられない／～じゃいられない (casual speech only; avoid in writing)
State-verbs are the norm: 見ている・安心している・のんびりしている etc. → 安心してはいられない
na-adjectives: stem + で + はいられない → 冷静ではいられない
Nouns: noun + で + はいられない → 他人事ではいられない、傍観者ではいられない
i-adjectives: essentially not used; recast as ～ではいられない or use a verb

Examples

Now that our competitor has cut prices, we can't just sit back and watch.
With the deadline looming, we can't afford to wait for head office's reply.
Faced with these losses, we can hardly take it easy.
On the matter of our client, we can't treat it as someone else's problem.
Hearing the figures had been falsified, I couldn't keep quiet.