1.
characterized by an inability to mask your feelings; not devious
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
The following are synonyms for 'artless'. Click on any of them to get both Bibliodata's full list of common definitions and a further set of synonyms.