This is the 9640th most frequent Polish word.
węgrowska
"Węgrowska" relates to something from or associated with Węgrów, a town in Poland.
Here, 'węgrowska' is used as an adjective derived from 'Węgrów', a town, to describe a specific type of sausage associated with that location.
Ta kiełbasa węgrowska jest bardzo smaczna.
This Węgrowska sausage is very tasty.
In this context, 'węgrowska' functions as a modifier, describing a group that is associated with, or originates from, Węgrów.
Spotkałem się z lokalną grupą węgrowską.
I met with the local Węgrowska group.
Here, 'węgrowska' is used as an adjective to convey attributes or aspects related to Węgrów, in this case referring to the town's cultural elements.