Source : Webster's Revised Unabridged Dictionary (1913)

Unstudied \Un*stud"ied\, a.
   1. Not studied; not acquired by study; unlabored; natural.

   2. Not skilled; unversed; -- followed by in.

   3. Not spent in study. [Obs.] ``To cloak the defects of their
      unstudied years.'' --Milton.

Source : WordNet®

unstudied
     adj 1: not by design or artifice; unforced and impromptu; "an air
            of unstudied spontaneous utterance is apt to be
            painstakingly achieved"; "simple unstudied charm"
            [syn: {uncontrived}] [ant: {studied}]
     2: lacking knowledge gained by study often in a particular
        field; "is unstudied in Latin as he is in may other
        matters"