noun, feminine/ˈnjebla/plural: nieblas
fog (a thick cloud that forms near the ground); fog (a state of mind characterized by lethargy and confusion)
“Hay niebla.” — It’s foggy.
Inherited from Old Spanish nevla, from Latin nebula (possibly through a contracted Vulgar Latin form *nebla), ultimately from Proto-Indo-European *nébʰos (“cloud”). Compare Galician néboa, Portuguese névoa, and Italian nebbia.