artless (adj.)youdaoicibaDictYouDict[artless 词源字典]
1580s, "unskillful," from art (n.) + -less. Later also "uncultured" (1590s); then "unartificial, natural" (1670s) and "guileless, ingenuous" (1714). Related: Artlessly; artlessness. [artless etymology, artless origin, 英语词源]