moped (n.)youdaoicibaDictYouDict[moped 词源字典]
1956, from Swedish (c. 1952), from (trampcykel med) mo(tor och) ped(aler) "pedal cycle with engine and pedals" (the earliest versions had auxiliary pedals). Compare obsolete English mo-bike (1925), from motor bicycle.[moped etymology, moped origin, 英语词源]