This is the 13591st most frequent Polish word.
piłkarska
"Piłkarska" means "football/soccer-related" or "pertaining to football/soccer."
In this sentence, "piłkarska" functions as an adjective modifying "drużyna" (team), indicating that the team is associated with the sport of football.
Drużyna piłkarska miała trening na stadionie.
The football team had training at the stadium.
Here, "piłkarska" describes "impreza" (event), suggesting that the theme of the event is related to football.
To była piłkarska impreza z wieloma atrakcjami.
It was a football-themed event with many attractions.
"Piłkarską" modifies "pasję" (passion), emphasizing that the players' passion is specifically related to football.