This is the 8765th most frequent Polish word.
rosyjskim
"Rosyjskim" means "Russian" in English, referring to something related to Russia or the Russian language.
Here, "rosyjskim" acts as an adjective describing the type of language, specifically the Russian language.
Podziwiam książki napisane w rosyjskim języku.
I admire books written in the Russian language.
In this sentence, "rosyjskim" is used to describe the type or origin of painting, indicating that it pertains to Russia or Russian culture.
Interesuję się rosyjskim malarstwem.
I am interested in Russian painting.
Here, "rosyjskim" is used as an adjective describing the market, indicating that the focus is on Russia’s market specifically.