Meaning & usage
わけにはいかない expresses that someone cannot do something because of duty, social expectations, or outside circumstances, even if they want to. It attaches to the dictionary form of a verb for not doing something, as in 行くわけにはいかない, and to the ない form for not avoiding something, as in 行かないわけにはいかない. It describes a social or situational restriction rather than physical inability, and it is often used to explain the speaker's own constrained choice.
Example sentences 5
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君がそうすることを許すわけにはいかない。
I can't allow you to do that.
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何事も思い通りにするわけにはいかない。
You cannot have your way in everything.
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したいしたいって言われても、させるわけにはいかない。
No matter how much you want to do that, I can't let you.
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お前にそんなこと、させるわけにはいかないよ。
I can't let you do that.
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子供だからと言って許すわけにはいかない。
I cannot forgive him just because he is a child.
In past JLPT papers
This came up in 1 past exam question.