Unlettered

прилагательное 1) неграмотный 2) необразованный Синоним(ы): uneducated, unlearned

Большой англо-русский словарь

Unlettered

adjective 1. a. lacking facility in reading and writing and ignorant of the knowledge to be gained from books b. illiterate 2. not marked with letters Synonyms: see ignorant

Merriam-Webster's Collegiate Dictionary