The Collaborative International Dictionary of English v.0.48:

Beggar \Beg"gar\, v. t. [imp. & p. p. Beggared; p. pr. & vb.
   n. Beggaring.]
   1. To reduce to beggary; to impoverish; as, he had beggared
      himself. --Milton.
      [1913 Webster]

   2. To cause to seem very poor and inadequate.
      [1913 Webster]

            It beggared all description.          --Shak.
      [1913 Webster]