pompom (n.)youdaoicibaDictYouDict[pompom 词源字典]
"ornamental round tuft" (originally on a hat, etc.), 1748, alteration of pompon "ornamental tuft; tuft-like flower head," from French pompon (1725), of unknown origin; perhaps related to Old French pompe "pomp."[pompom etymology, pompom origin, 英语词源]