pimple (n.)youdaoicibaDictYouDict[pimple 词源字典]
late 14c. (early 14c. as a surname), of unknown origin; perhaps related to Old English pipligende "having shingles;" also compare Latin papula, papilla (see pap (n.2)). As a verb from c. 1600. Related: Pimples.[pimple etymology, pimple origin, 英语词源]