"Польским" is the instrumental case of the adjective "польский," which means "Polish" in English. It is used to describe something that originates from or is related to Польша (Poland), such as culture, language, or nationality. In the context of language, "польским" can refer to the польский язык (Polish language), which is a West Slavic language spoken primarily in Poland. It is known for its complex grammar and rich vocabulary, reflecting the country's history and cultural influences.