This is the 8288th most frequent Polish word.
pacyfiku
"Pacyfiku" means "of the Pacific" in English.
Here, 'Pacyfiku' is used in the genitive case indicating the location.
W zeszłym roku spędziłem dwa tygodnie nad Pacyfiku.
Last year, I spent two weeks by the Pacific.
In this sentence, 'Pacyfiku' is in the genitive case used to describe the state of the Pacific.
Nie widziałem jeszcze tak spokojnego Pacyfiku.
I have not yet seen such a calm Pacific.
Here, 'Pacyfik' is in the accusative case, indicating the destination of the trip.