The Collaborative International Dictionary of English v.0.48:

Enamor \En*am"or\, v. t. [imp. & p. p. Enamored; p. pr. & vb.
   n. Enamoring.] [OF. enamourer, enamorer; pref. en- (L. in)
   + OF. & F. amour love, L. amor. See Amour, and cf.
   Inamorato.]
   To inflame with love; to charm; to captivate; -- with of, or
   with, before the person or thing; as, to be enamored with a
   lady; to be enamored of books or science. [Written also
   enamour.]
   [1913 Webster]

         Passionately enamored of this shadow of a dream. --W.
                                                  Irving.
   [1913 Webster]