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The Collaborative International Dictionary
Oppignerate

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.

Wiktionary
oppignerate

vb. (context obsolete rare English) To pledge; to pawn.