This is the 8241st most frequent Polish word.
ostrołęki
The word "ostrołęki" does not have a specific definition in English; it is likely a proper noun referring to Ostrołęka, a city in Poland.
In this sentence, 'Ostrołęce' is used as a locative form of the noun 'Ostrołęka', which is the name of a city. The locative case is used after prepositions indicating place, such as 'w', meaning 'in'.
Byłem niedawno w Ostrołęce i podziwiałem jej zabytki.
I was recently in Ostrołęka and admired its monuments.
Here, 'Ostrołęki' is a possessive genitive form showing that the city belongs to Ostrołęka indirectly. It's referring to the city's association with its name.
Miasto Ostrołęki jest znane z kultury kurpiowskiej.
The city of Ostrołęka is known for Kurpie culture.
In this example, 'Ostrołęki' is in the genitive case, which is used to denote possession or association. It indicates that the map pertains to Ostrołęka.