The Collaborative International Dictionary of English v.0.48:

Pignerate \Pig"ner*ate\, v. t. [L. pigneratus, p. p. of
   pignerate to pledge.]
   1. To pledge or pawn. [Obs.]
      [1913 Webster]

   2. to receive in pawn, as a pawnbroker does. [Obs.]
      [1913 Webster]