词根：-ped-
【词根含义】：足;儿童
【词根来源】：原始印欧语ped-,pod-(足)在希腊语中的派生词有pous(足)和pedon(土壤,儿童,足);在拉丁语中的派生词有pes, ped.is, m(足)和pod.ium(阳台,剧场的包厢)等。
【同源单词】：biped, centipede, expedient, expedite, expedition
前缀：il-, in-, ir-, im-
【词根含义】：不,无,非;入,向内
【词根来源】：(il-用于l前;im-用于b, m, p前;ir-用于r前;in-用于其它情况) 来源于拉丁语in。
【同源单词】：illegal, illegality, illegitimate, illiterate, illogical
词根词缀：ped-, pedi-, -pedal, -ped, -pede, -pedia
【来源及含义】Latin: foot, feet; people often see this ped element in other words. When people refer to "pedal extremities", they mean "feet". When anyone pushes the pedals of a bicycle, it is done with the feet. A pedestrian must use the feet for walking. A quadruped has four feet while a centipede has "100 feet"; or a large number of them because it may be impossible to count all of them.
【相关词根词缀】 Related "foot, feet" units: melo-; planta-; podo-; -pus.