This is the 10107th most frequent Polish word.
bieżącą
"Current" or "ongoing."
The word 'bieżącą' is used here as an adjective, modifying 'sprawą' (issue), and means 'current' or 'ongoing'.
Muszę się zająć bieżącą sprawą przed końcem dnia.
I need to take care of the current issue before the end of the day.
The word 'bieżącą' modifies 'siłą' (force) as an adjective, emphasizing the concept of being immediate or happening in real-time.
Woda w łazience płynie z bieżącą siłą.
The water in the bathroom flows with current force.
In this sentence, 'bieżącą' describes 'wystawę' (exhibition), indicating the exhibition is ongoing at the present time.