Source : Webster's Revised Unabridged Dictionary (1913)

Impawn \Im*pawn"\, v. t. [imp. & p. p. {Impawned}; p. pr. & vb.
   n. {Impawning}.] [Pref. im- + pawn: cf. {Empawn}.]
   To put in pawn; to pledge. --Shak.