This is the 8911th most frequent Polish word.
siarzewo
"Siarzewo" is a proper noun, referring to a village in Poland.
Here, 'Siarzewo' serves as a proper noun, denoting a specific place name, the town of Siarzewo.
Siarzewo znajduje się nad Wisłą.
Siarzewo is located by the Vistula River.
In this sentence, 'Siarzewie' is the locative case of 'Siarzewo,' used when referring to location.
W Siarzewie mieszka wielu miłych ludzi.
In Siarzewo there lives many kind people.
Here, 'Siarzewo' is in the accusative case as the destination of the visitation action.