This is the 3754th most frequent Polish word.
mazurska
"Mazurska" refers to something related to the Mazury (Masuria) region in Poland or the traditional Mazurka dance.
Here, 'mazurskie' is an adjective derived from 'Mazury' (Masurian region in Poland) used to describe the lakes in the area.
Jeziora mazurskie są piękne.
Mazurian lakes are beautiful.
In this sentence, 'mazurska' functions as an adjective describing a traditional dish associated with the Masurian region.
Moją ulubioną potrawą jest zupa mazurska.
My favorite dish is the Mazurian soup.
Here, 'mazurska' serves as an adjective to describe the type of music originating from or inspired by the Mazury region.