unlearned

Short definition from Wiktionary

Adjective

1. 1
   ignorant, uneducated, untaught, untrained.
2. 2
   Of a behavior: not learned; innate.
3. 3
   Of information: that has not (yet) been learned; unknown.

Verb

1. 1
   simple past and past participle of unlearn (“discard the knowledge of”)