This is the 1483rd most frequent Polish word.
kosiniak
"Kosiniak" does not have a direct meaning in Polish; it is typically a surname.
Here, 'kosiniak' is used to refer to a specific item, namely a traditional dish, showcasing its usage as a noun in a context that could be cultural or culinary.
Kosiniak jest tradycyjnym daniem regionalnym.
Kosiniak is a traditional regional dish.
In this sentence, 'Kosiniaków' refers to a family surname, illustrating its usage in the genitive plural form to describe possession or relation.
Rodzina Kosiniaków mieszka w tym mieście od lat.
The Kosiniak family has lived in this town for years.
Here, 'Kosiniaka' is utilized as an accusative case of the surname 'Kosiniak', used to specify whom Janek met.