This is the 3134th most frequent Polish word.
przestrzegać
To obey, adhere to, or follow (rules, laws, or advice).
In this sentence, "przestrzegać" means "to follow" or "to adhere to," specifically referring to obeying established rules.
Musisz przestrzegać zasad gry.
You must follow the rules of the game.
Here, "przestrzegać" is used in the sense of "to warn" or "to caution," showing concern or giving a warning.
Rodzice przestrzegają dzieci przed niebezpieczeństwem.
Parents warn children about dangers.
In this sentence, "przestrzegać" is implied in its noun form "przestrzeganie," meaning "the act of adhering to."