pedaling

1.

trappen

a small part of a machine or object that is pushed down with the foot to operate or move the machine or object:

:
the brake/accelerator pedal
1.

trappen

operated by a pedal or pedals:

:
a pedal bike/boat/car
1.

trappen

to push the pedals of a bicycle with your feet:

:
He struggled to pedal his bicycle up the hill.