unlettered
From Longman Dictionary of Contemporary Englishunletteredun‧let‧tered /ʌnˈletəd $ -ərd/ adjective formal STUPID/NOT INTELLIGENTunable to read, or uneducated SYN illiterateExamples from the Corpusunlettered• Their ideas gain plausibility amongst the idle, the envious and the unlettered.• His lifelong political rival, the charismatic, unlettered Eric Gairy, mocked Blaize's kindly manner as weakness.• How could the testimony of an unlettered rustic stand against the authority of an Aristotle?