What root do pedal and pedestrian have in come what does it mean?

The root that "pedal" and "pedestrian" share is "ped-", which comes from the Latin word "pes" meaning "foot".

Here's how it breaks down:

* Pedal: This refers to a lever that is operated by the foot, such as on a bicycle.

* Pedestrian: This refers to someone who travels on foot.

So, the root "ped-" in both words directly connects them to the concept of walking or using the foot for movement.