This is the 14940th most frequent Polish word.
rolka
"Rolka" in Polish means "a roll" or "a spool."
The word 'rolka' is used to mean a roll, as in a coiled sheet of tape.
Mam rolkę taśmy klejącej.
I have a roll of adhesive tape.
Here, 'rolkach' (plural form of rolka) refers to inline skates or roller skates, used in a context of a recreational activity.
Wczoraj przejechałem na rolkach do parku.
Yesterday, I skated to the park.
In this context, 'rolka' metaphorically signifies a small acting part in a film, derived from the idea of a roll of film.