inept (adj.)youdaoicibaDictYouDict[inept 词源字典]
c. 1600, from Old French inepte (14c.) or directly from Latin ineptus "unsuitable, improper, absurd, awkward, silly, tactless," from in- "not, opposite of" (see in- (1)) + aptus "apt" (see apt). Related: Ineptly; ineptness.[inept etymology, inept origin, 英语词源]