let the cat out of the bag (verb) spill: reveal
Sinonime: benighted, catachrestic,
ignorant, inerudite, solecistic, uneducated, unenlightened, ungrammatical, uninstructed, unlearned, unlettered, unread, unschooled, untaught, untutored
Antonime: able, educated,
learned, literate,
taught