The Collaborative International Dictionary of English v.0.48:

Inexperience \In`ex*pe"ri*ence\, n. [L. inexperientia, cf. F.
   inexp['e]rience. See In- not, and Experience.]
   Absence or lack of experience; lack of personal and
   experimental knowledge; as, the inexperience of youth.
   [1913 Webster]

         Failings which are incident to youth and inexperience.
                                                  --Dryden.
   [1913 Webster]

         Prejudice and self-sufficiency naturally proceed from
         inexperience of the world, and ignorance of mankind.
                                                  --Addison.
   [1913 Webster]

WordNet (r) 3.0 (2006):

inexperience
    n 1: lack of experience and the knowledge and understanding
         derived from experience; "procedural inexperience created
         difficulties"; "their poor behavior was due to the rawness
         of the troops" [syn: inexperience, rawness] [ant:
         experience]