This is the 12205th most frequent Polish word.
małopolskich
"Małopolskich" means "of Lesser Poland" (relating to the region of Małopolska in Poland).
Here, "małopolskich" functions as an adjective describing the forests that belong to the region named Lesser Poland (Małopolska) in Poland.
Zamek w Niepołomicach znajduje się na terenie małopolskich lasów.
The castle in Niepołomice is located in the area of Lesser Poland's forests.
In this sentence, "małopolskich" modifies "osad" (settlements), indicating that these settlements are associated with the Lesser Poland region.
Badania archeologiczne odkryły pozostałości małopolskich osad sprzed tysiąca lat.
Archaeological research uncovered remains of Lesser Poland's settlements from a thousand years ago.
Here, "małopolskich" is used to describe "tradycjach" (traditions) and "zwyczajach" (customs), specifying they are typical of the Lesser Poland region.