analphabetic, unlettered -- (having little acquaintance with writing; "special tutorials to assist the unlettered sector of society")
ignorant, nescient, unlearned, unlettered -- (uneducated in general; lacking knowledge or sophistication; "an ignorant man"; "nescient of contemporary literature"; "an unlearned group incapable of understanding complex issues"; "exhibiting contempt for his unlettered companions")