cloud up
中級 (B1)neutral
When clouds fill up the sky, or when a glass or mirror gets all steamy and you can't see through it.
"It was a beautiful morning, but it started to cloud up around lunchtime."
When clouds fill up the sky, or when a glass or mirror gets all steamy and you can't see through it.
"It was a beautiful morning, but it started to cloud up around lunchtime."