This is the 7204th most frequent Polish word.
jarosławski
"Jarosławski" means "of or pertaining to Jarosław," a town in southeastern Poland.
Here, 'jarosławski' is used as an adjective derived from the proper noun 'Jarosław,' referring to that which pertains to the city or region of Jarosław.
Jarosławski rynek jest pełen historycznych budowli.
The market square in Jarosław is filled with historical buildings.
In this usage, 'jarosławski' describes the origin or connection of the artist to the city of Jarosław.
Spotkałem jarosławskiego artystę malarza.
I met a painter from Jarosław.
Here, 'jarosławska' is the feminine form of the adjective, used to describe the traditions and culture associated with Jarosław.