This is the 6986th most frequent Polish word.
grodzkiej
"Grodzkiej" is the genitive or locative form of "grodzka," meaning "of the town" or "urban."
Adjectival form of 'gród' referring to something related to a town or settlement, here modifying 'społeczności'.
Książka opowiada historię grodzkiej społeczności.
The book tells the story of the town community.
Descriptive use describing a specific part of a city belonging to or associated with a town ('gród').
W grodzkiej części miasta znajduje się wiele historycznych budowli.
In the town's part of the city, there are many historical buildings.
Used attributively to describe the 'council' as pertaining to or governing a town ('gród').