This is the 17377th most frequent Polish word.
zapoznani
"Zapoznani" means "acquainted" or "familiarized."
Here, 'zapoznani' is used to indicate that the speakers have become familiar with or have knowledge of the situation.
Jesteśmy zapoznani z tą sytuacją.
We are familiar with this situation.
In this sentence, 'zapoznani' conveys that they have been informed or have learned about the rules.
Oni są zapoznani z zasadami gry.
They are acquainted with the rules of the game.
In this case, 'zapoznani' is used to mean that someone will be informed or shown certain things in the future.