This is the 3681st most frequent Polish word.
julią
"Julią" is the instrumental case of the Polish name "Julia," meaning "with Julia" or "by Julia."
In this sentence, 'Julią' is an instrumental case of the name 'Julia', used with the preposition 'z' (with) to indicate accompaniment.
Piotr poszedł na spacer z Julią.
Piotr went for a walk with Julia.
Here, 'Julią' is still in the instrumental case, used because the preposition 'o' (about) in Polish requires the instrumental case when expressing matters relating to someone or something.
Podzieliłem się historią o Julią.
I shared a story about Julia.
In this example, 'Julią' again is in instrumental case, reflecting the relationship and interaction described by the verb combined with the preposition.