This is the 11973rd most frequent Polish word.
kółko
The Polish word "kółko" means "small circle" or can refer to a club/group.
Here, 'kółko' refers to a club or group associated with a particular activity, in this case, a math club.
Dzieci bawiły się na szkolnym kółku matematycznym.
The children played at the school math club.
In this sentence, 'kółko' is used to refer to a circular shape or a round object.
Marek narysował na kartce duże kółko.
Marek drew a large circle on the paper.
Here, 'kółko' describes a situation or movement resembling a circle, specifically referring to the spinning motion of the car.