This is the 610th most frequent Polish word.
polki
"Polki" is the plural of "Polka," meaning Polish women.
Here, "polki" is the plural form of "Polka," which is a noun meaning a Polish woman. It refers to women of Polish nationality.
Polki są bardzo dumne ze swojej kultury.
Polish women are very proud of their culture.
In this sentence, "polki" is the plural form of "polka," which is a noun referring to a type of fast-paced dance originating from Poland. It denotes the dances themselves.
Na weselach często tańczy się polki.
At weddings, polkas are often danced.
Here, "polki" refers to the genitive singular form of "polka," implying books regarding the study or techniques of the polka dance style.