Unenlightened
Part of speech: adjective
Definition: Not enlightened; ignorant in general or of some particular fact.
Uninformed
Part of speech: adjective
Definition: not informed; ignorant
Example sentence: I don't know if it's a failure of imagination on my part, but I'm not going to be writing about Paris in the 1800s. I feel like it would come off as just ludicrously uninformed, even if I did a lot of research.