artless

adjective4

1. •
   Having or displaying no guile, cunning, or deceit.

   • And why should I here suppress the delight I received from this amiable creature, in remarking each artless look, each motion of pure undissembled nature, betrayed by his wanton eyes — 1749
2. •
   Free of artificiality; natural.

   • This pendant has artless charm.
3. •
   Lacking art, knowledge, or skill; uncultured and ignorant.
4. •
   Poorly made or done; crude.