[adj] simple and natural; without cunning or deceit; "an artless manner"; "artless elegance"
[adj] characterized by an inability to mask your feelings; not devious; "an ingenuous admission of responsibility"
[adj] (of persons) lacking art or knowledge
[adj] showing lack of art; "an artless translation"
candid, careless, guileless, honest, ingenuous, naive, open, uncultivated, uncultured, undistorted, unrefined, unskilled, unsophisticated