The meaning of pedestrian is displayed with the morphemes ped- ('foot') and -ian ('characteristic of'). This word is derived from the Latin term pedester ('going on foot') and was first used (in English language) during the 18th century. It was originally used, and can still be used today, as an adjective meaning plain or dull. However, in this article it takes on its noun form and refers to someone who walks.
The word pedestrian can have been used in middle french in the Recueil des Croniques et Anchiennes Istories de la Grant Bretaigne, à présent nommé Engleterre.