The Collaborative International Dictionary of English v.0.48:

Inexpert \In`ex*pert"\, a. [L. inexpertus inexperienced: cf. F.
   inexpert. See In- not, and Expert.]
   [1913 Webster]
   1. Destitute of experience or of much experience. [Obs.]
      --Milton.
      [1913 Webster]

   2. Not expert; not skilled; destitute of knowledge or
      dexterity derived from practice. --Akenside.
      [1913 Webster]

WordNet (r) 3.0 (2006):

inexpert
    adj 1: lacking professional skill or expertise; "a very
           amateurish job"; "inexpert but conscientious efforts";
           "an unskilled painting" [syn: amateurish, amateur,
           inexpert, unskilled]

Moby Thesaurus II by Grady Ward, 1.0:

20 Moby Thesaurus words for "inexpert":
   artless, half-assed, inadept, inapt, inattentive, inefficient,
   inept, mediocre, pedestrian, poor, skill-less, thoughtless, unapt,
   undeft, undexterous, undextrous, unfacile, unintelligent,
   unproficient, unskillful