This is the 7346th most frequent Polish word.
kaszubska
"Kaszubska" means "Kashubian," relating to the Kashubian people, their language, or culture.
In this sentence, 'kaszubska' is used as an adjective describing the music, indicating its association with the Kashubian culture.
Słyszałem kaszubska muzykę na festiwalu.
I heard Kashubian music at the festival.
Here, 'kaszubska' modifies 'tradycja' (tradition), showing it pertains to the traditions of the Kashubian community.
Kaszubska tradycja przekazywana jest z pokolenia na pokolenie.
The Kashubian tradition is passed down from generation to generation.
In this example, 'kaszubska' characterizes the dinner, suggesting that it features Kashubian cuisine or customs.