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Kotomora
JLPT N2Written, formalReluctant

ざるを得えないhave no choice but to

Circumstances leave no way out, so you do it, though you would rather not: "have no choice but to". Or the facts leave no way out of a conclusion: "I have to admit".

How to form it

Verb ない-form: ない → ざるを得えない  する → せざるを得えない

行いかない → 行いかざるを得えない, 辞やめない → 辞やめざるを得えない, 来こない → 来こざるを得えない. する is the one irregular: せざるを得えない, never しざるを得えない. It is the same old stem as in せずに. Past 得えなかった, polite 得えません.

Before it
Something you would sooner not do, or not believe: 辞やめる, あきらめる, 中ちゅう止しする, 認みとめる.
What forces it
Usually said first, with ため, ので or 以い上じょう.
Where you'll meet it
News, reports, statements, essays, and careful speech in meetings and interviews. Among friends it is usually しかない.

Word for word it is "can't manage not to": ざる is an old ない. Two negatives, so the thing does get done.

In use

I have to say that the response this time was too slow.

と言いわざるを得えない, "I have to say", is how commentators and officials deliver a hard verdict.

It's for what you would rather not do

Plain なければならない covers any duty. This one says you were pushed into it. With something you are glad to do, it comes out as a joke.

Sounds odd: こんなに安やすいなら、買かわざるを得えない。

At this price, I have no choice but to buy it.

Said with a grin, online especially.

Close neighbours

しかないN3

What people say. The same "no other choice" in everyday words.

よりほかない・ほかないN2

Written too. The weight is on the options running out, not on your reluctance.

やむを得えない・やむを得えずN2

やむを得えない is "unavoidable". やむを得えず is a word of its own, in front of an ordinary verb: やむを得えず中ちゅう止しした says what 中ちゅう止しせざるを得えなかった says.

ずにはいられないN2

"Can't help doing": a feeling is too strong, so you do it.

Check yourself

1Which one is right?

台たい風ふうで、旅りょ行こうを(  )。

Choose an answer to see why.

2What happened?

部ぶ長ちょうに頼たのまれて、日にち曜よう日びも出しゅっ勤きんせざるを得えなかった。

Choose an answer to see why.

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