"artless" in the adjective sense
1. ingenuous, artless
characterized by an inability to mask your feelings not devious
"an ingenuous admission of responsibility"
simple and natural without cunning or deceit
"an artless manner"
showing lack of art
"an artless translation"
4. artless, uncultivated, uncultured
of persons) lacking art or knowledge
Source: WordNet® (An amazing lexical database of English)
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