This is the 5234th most frequent Polish word.
regulaminu
"Regulaminu" means "of the regulations" or "of the rules" in English.
Here, 'regulaminu' is the genitive case of 'regulamin', meaning 'regulations' or 'rules', and it's used in the context of specifying what was read.
Przeczytałem całość regulaminu przed podpisaniem umowy.
I read the entire regulations before signing the contract.
In this sentence, 'regulaminu' appears in the genitive case to describe the rules being referenced for understanding.
Zapoznaj się z treścią regulaminu przed skorzystaniem z usługi.
Familiarize yourself with the content of the regulations before using the service.
Here, 'regulaminu' signifies the genitive case, showing possession, as it clarifies what document was altered.