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в ответе

responsible; accountable

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phrase Rare #45,704
responsible; accountable In the expression за кого/что в ответе, it means being responsible or accountable for someone or something. It can also literally mean “in the answer,” as in В ответе есть ошибка (“There is a mistake in the answer”).
RU: Я за тебя в ответе.
EN: I’m responsible for you.

Но в ответе есть ещё и сарказм.

But there is also sarcasm in the answer.

Я благодарна ей, что она меня родила, но я за это не в ответе.

I’m grateful to her for giving birth to me, but I’m not responsible for that.

— Жить (1952)

Я за тебя в ответе.

I'm responsible for you.

Мы за них в ответе.

We're responsible for them.