No. 10,460 in Polish
czyją
"Czyją" means "whose" (feminine singular or plural, accusative case).
In a sentence
Czyją książkę zostawiłeś na stole?
Whose book did you leave on the table?
The word "czyją" is used here as an interrogative pronoun asking about possession and modifying the noun "książkę" in the accusative case.
Zastanawiam się, czyją decyzją kierujemy się w tej sprawie.
I am wondering whose decision we are following in this matter.
The word "czyją" here identifies the owner of the decision in question, modifying the noun "decyzją" in the accusative case.
Nie wiem, czyją to było winą.
I don't know whose fault it was.
In this context, "czyją" asks about the person responsible, modifying the noun "winą" in the instrumental case.
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