This is the 2102nd most frequent Russian word.
польша
Poland (a country in Europe).
Indicates the name of the country used in locative case (Польше) to show location.
Я был в Польше прошлым летом.
I was in Poland last summer.
Indicates the name of the country used in genitive case (Польши) to indicate possession.
Мы изучаем историю Польши в школе.
We study the history of Poland at school.
Indicates the name of the country used in nominative case (Польша) as the subject of the sentence.