Source : Webster's Revised Unabridged Dictionary (1913)

Wonder \Won"der\, v. i. [imp. & p. p. {Wondered}; p. pr. & vb.
   n. {Wondering}.] [AS. wundrian.]
   1. To be affected with surprise or admiration; to be struck
      with astonishment; to be amazed; to marvel.

            I could not sufficiently wonder at the intrepidity
            of these diminutive mortals.          --Swift.

            We cease to wonder at what we understand. --Johnson.

   2. To feel doubt and curiosity; to wait with uncertain
      expectation; to query in the mind; as, he wondered why
      they came.

            I wonder, in my soul, What you would ask me, that I
            should deny.                          --Shak.

Source : WordNet®

wondering
     adj : showing curiosity; "if someone saw a man climbing a light
           post they might get inquisitive"; "raised a speculative
           eyebrow" [syn: {inquisitive}, {speculative}, {questioning},
            {wondering(a)}]