counter
counter for wheels and flowers
Used to count wheels (e.g., of vehicles) and flowers (especially large blooms like roses).
この車は四輪駆動です。
This car is four-wheel drive.
バラを三輪買いました。
I bought three roses.
From the kanji 輪 meaning 'ring' or 'wheel', used as a counter for wheel-shaped or flower-shaped objects.