Source : Webster's Revised Unabridged Dictionary (1913)

Impone \Im*pone"\, v. t. [L. imponere, impositum, to place upon;
   pref. im- in + ponere to place. See {Position}.]
   To stake; to wager; to pledge. [Obs.]

         Against the which he has imponed, as I take it, six
         French rapiers and poniards.             --Shak.