The Collaborative International Dictionary of English v.0.48:

Unenlightened \Unenlightened\
   See enlightened.

WordNet (r) 3.0 (2006):

unenlightened
    adj 1: not enlightened; ignorant; "the devices by which
           unenlightened men preserved the unjust social order"
           [ant: enlightened]
    2: lacking information or instruction; "lamentably unenlightened
       as to the laws" [syn: uninstructed, unenlightened,
       naive]