The Collaborative International Dictionary of English v.0.48:

Pill \Pill\, v. t. & i. [imp. & p. p. Pilled; p. pr. & vb. n.
   Pilling.] [F. piller, L. pilare; cf. It. pigliare to take.
   Cf. Peel to plunder.]
   To rob; to plunder; to pillage; to peel. See Peel, to
   plunder. [Obs.] --Spenser.
   [1913 Webster]

         Pillers and robbers were come in to the field to pill
         and to rob.                              --Sir T.
                                                  Malroy.
   [1913 Webster]