incompetence (n.)youdaoicibaDictYouDict[incompetence 词源字典]
1660s, "inadequacy;" 1716, "want of skill," from French incompétence (mid-16c.), from in- "not, opposite of, without" (see in- (1)) + compétence (see competence). Native formation incompetency (from incompetent + -cy) is attested from 1610s.[incompetence etymology, incompetence origin, 英语词源]