WordWeb Online

1. Characterized by an inability to mask your feelings; not devious
   "an artless admission of responsibility";
   - ingenuous
    
2. Simple and natural; without cunning or deceit
   "an artless manner"; "artless elegance"
    
3. Showing lack of art
   "an artless translation"
    
4. (of persons) lacking art or knowledge
   "artless persons have full means of knowing with absolute certainty God's existence";
   - uncultivated, uncultured

See also: candid, careless, heart-to-heart, naif, naïf, naive, naïve, natural, open, sincere, undistorted, unrefined, unskilled

Antonym: artful

Encyclopedia: Artless