cloud over
US /klaʊd ˈoʊvər/
UK /klaʊd ˈoʊvər/

1.
nublarse, ensombrecerse
If a person's face clouds over, it shows that they are sad or angry.
:
•
Her face clouded over when she heard the bad news.
Su rostro se nubló cuando escuchó las malas noticias.
•
His expression clouded over as he considered the implications.
Su expresión se nubló mientras consideraba las implicaciones.
2.
nublarse, cubrirse de nubes
If the sky or the weather clouds over, it becomes covered with clouds and looks as if it is going to rain.
:
•
The sky began to cloud over, threatening rain.
El cielo comenzó a nublarse, amenazando lluvia.
•
It was a beautiful morning, but by afternoon, it had clouded over.
Era una hermosa mañana, pero por la tarde, se había nublado.