This is the 730th most frequent Norwegian word.
polske
"Polske" refers to a traditional Norwegian folk dance or the music for such a dance.
In this sentence, 'polske' is an adjective used to describe the nationality of the dish, Polish, in relation to 'pierogi'.
Polske pierogi er en populær rett.
Polish pierogi are a popular dish.
Here, 'polske' is used as an adjective referring to the origin or characteristic of the cities—being Polish.
Vi besøkte mange polske byer på reisen.
We visited many Polish cities on the trip.
In this example, 'polske' again functions as an adjective, modifying 'ambassadør' to specify their nationality as Polish.