idiotic (adj.)youdaoicibaDictYouDict[idiotic 词源字典]
1713, from Late Latin idioticus "uneducated, ignorant," in classical Latin, "of an ordinary person," from Greek idiotikos "unprofessional, unskilled; not done by rules of art, unprofessional," from idiotes (see idiot). Idiotical is from 1640s. Related: Idiotically.[idiotic etymology, idiotic origin, 英语词源]