unsophisticated, unworldly -- (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 -- (lacking complexity; "small and uncomplicated cars for those really interested in motoring"; "an unsophisticated machine")
bumpkinly, hick, rustic, unsophisticated -- (awkwardly simple and provincial; "bumpkinly country boys"; "rustic farmers"; "a hick town"; "the nightlife of Montmartre awed the unsophisticated tourists")
(Sound)
