pixie (n.)youdaoicibaDictYouDict[pixie 词源字典]
c. 1630, of obscure origin, perhaps from or related to Swedish dialect pyske "small fairy," but West County origin suggests ultimate source in Cornwall and thus something Celtic. Earliest references were in pixy-path "bewilderment," literally "path on which one is led astray by pixies," and pixie-led "lost."[pixie etymology, pixie origin, 英语词源]