naive |nīˈēv| (also naïve)

adjective

(of a person or action) showing a lack of experience, wisdom, or judgment : the rather naive young man had been totally misled.

• (of a person) natural and unaffected; innocent : Andy had a sweet, naive look when he smiled.

• of or denoting art produced in a straightforward style that deliberately rejects sophisticated artistic techniques and has a bold directness resembling a child's work, typically in bright colors with little or no perspective.