undeceived
1. [ adjective ] freed of a mistaken or misguided notion
Synonyms: disabused
Examples:

"some people are still not disabused of the old idea that the universe revolves around the Earth"

Related terms: disenchanted
Similar spelling:   undeceive
  undesired
  undesigned
  undeserved
  undeservedly
  undeclared
  undecided
  undescriptive
  uneducated
  undescended
  undecorated
  undesirable
  undesirous
  undesiring