unsophisticated, unworldly (adj)

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

uncomplicated, unsophisticated (adj)

lacking complexity

"small and uncomplicated cars for those really interested in motoring"; "an unsophisticated machine"

bumpkinly, hick, rustic, unsophisticated (adj)

awkwardly simple and provincial

"bumpkinly country boys"; "rustic farmers"; "a hick town"; "the nightlife of Montmartre awed the unsophisticated tourists"

unsophisticated (Adjective)

Not sophisticated; lacking sophistication.