modified
unlettered, rude, boorish, uneducated, ignorant, illiterate, clownish, untutored, untaught, unread, savage, uncivilized, doltish, crass, half-taught, half-educated, uninitiated, ill-bred, unversed, uninstructed, unguided, unenlightened, benighted, dull, misguided, empty, unaccomplished, backward, superficial, pedantic, low-brow*.
Antonyms learned, educated, adept. See syn. study at ignorant.ignorant.