unsophisticated

adjective

1. 1

   awkwardly simple and provincial

   bumpkinly country boys

   rustic farmers

2. 2

   lacking complexity

   small and uncomplicated cars for those really interested in motoring

   an unsophisticated machine

3. 3

   not wise in the ways of the world

   either too unsophisticated or too honest to promise more than he could deliver

   this helplessly unworldly woman"- Kate O'Brien