Open English Wordnet
Adjectives
(s)analphabetic, unletteredhaving little acquaintance with writing“special tutorials to assist the unlettered sector of society”
(s)ignorant, nescient, unlearned, unlettereduneducated 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”