A naive person; a greenhorn.
Produced in a simple, childlike style, deliberately rejecting sophisticated techniques.
Lacking worldly experience, wisdom, or judgement; unsophisticated.
Intuitive; designed to follow the way ordinary people approach a problem.
Not having been exposed to something.
In an underhanded manner.
Done by moving the hand (and arm) from below.
Sly, dishonest, corrupt, cheating.
Insincere; sarcastic.
An underhanded compliment is actually criticism.
Secret; surreptitious.
His underhanded trick backfired and he was disqualified.
Understaffed.
Devious people, collectively.