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While talking about the weather, I said:

> ✖️ いきなり涼しくなった

My interlocutor corrected me:

> ◯ 急に涼しくなった

I would like to understand what makes いきなり inappropriate to avoid making the
same kind of mistake again.

I have found that the following sentences are correct even though they look
quite similar to 「涼しくなった」 to me:

> ◯ いきなり揺れた。 （今朝起きた地震についてなど）
>
> ◯ 車を運転していたら、いきなりタイヤが破裂した。
>
> ◯ いきなりトイレが使えなくなった。

I have read [this](https://japanese.stackexchange.com/questions/14020/), but
it did not help me understand when _not_ to use いきなり.
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2021-11-07T05:14:24.973
91097
2021-11-08T02:26:35.420
2021-11-07T11:23:05.567
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question
word-usage
What is wrong with いきなり涼しくなった
いきなり is not terribly wrong, but いきなり tends to express a truly instant event
that occurs all of a sudden. If I understand the context correctly, you are
describing a phenomenon that progresses over a few days, so 急に sounds more
natural. But if you have unexpectedly entered a cold room, saying いきなり涼しくなった
is equally natural.

As the linked question says, いきなり also carries the nuance of subjective
unexpectedness or mental unpreparedness, but this difference is not important
now.
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2021-11-08T02:17:01.173
91107
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2021-11-08T02:26:35.420
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answer