This is the 5624th most frequent Polish word.
wełniany
Made of wool.
Wełniany is used as an adjective describing the sweater as being made of wool.
Lubię sweter wełniany, który kupiłem zimą.
I like the woolen sweater that I bought in winter.
Here, wełniany describes a teddy bear, emphasizing the material.
Na podium stoi miś wełniany, trofeum z zawodów.
On the podium stands a woolen teddy bear, a trophy from the competition.
This sentence uses wełniany to specify that the scarf is made from wool.