before vowels ped-, word-forming element meaning "boy, child," from Greek pedo-, combining form of pais "boy, child," especially a son, from PIE root *pau- (1) "few, little." The British form paed- is better because it avoids confusion with the ped- that means "foot" (from PIE root *ped-) and the ped-that means "soil, ground, earth." Compare, from the same root, Sanskrit putrah "son;" Avestan puthra- "son, child;" Latin puer "child, boy," Oscan puklu "child."
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<a href="https://www.etymonline.com/word/orthopaedics">Etymology of orthopaedics by etymonline</a>
Harper, D. (n.d.). Etymology of orthopaedics. Online Etymology Dictionary. Retrieved $(datetime), from https://www.etymonline.com/word/orthopaedics