oppignerate

from The Collaborative International Dictionary of English v.0.48

Oppignerate \Op*pig"ner*ate\, v. i. [L. oppigneratus, p. p. of
   oppignerare to pawn. See {Ob-}, and {Pignerate}.]
   To pledge; to pawn. [Obs.] --Bacon.
   [1913 Webster]