The document defines Latin and Greek root words related to "ped", which means foot in Latin and child in Greek. It provides examples of words using the ped root along with their meanings, including biped, meaning a two-footed creature; centipede, meaning a creature with 100 feet; and pedestrian, meaning a person who walks across the street on foot. It concludes by reminding the reader that the Latin root word ped means foot, while the Greek root word ped means child.