Oncíns

The word "oncíns" is the plural form of "oncín." "Oncín" (sometimes written as "oncin") is a regional term, primarily used in parts of Spain, particularly in the Basque Country and Navarra, to refer to a thick, dense fog or mist, especially one that rolls in from the sea or mountains. It often implies a cold and damp quality to the fog. It's not a standard Spanish word recognized universally, but rather a localized term. While not a technical or scientific term, its usage is culturally relevant within its region of origin to describe a specific type of weather phenomenon. The prevalence of the word is decreasing, with more standard Spanish words for fog being used.