Having or displaying no guile, cunning, or deceit.
Free of artificiality; natural.
Poorly made or done; crude.
Lacking art, knowledge, or skill; uncultured and ignorant.
Barely noticeable, not obvious, indistinct.
Tenuous; rarefied; of low density or thin consistency.
Cleverly contrived.
Cunning, skillful.
Insidious.
Hard to grasp; not obvious or easily understood.