Source : Webster's Revised Unabridged Dictionary (1913)

Jeopardize \Jeop"ard*ize\, v. t. [imp. & p. p. {Jeopardized}; p.
   pr. & vb. n. {Jeopardizing}.]
   To expose to loss or injury; to risk; to jeopard.

         That he should jeopardize his willful head Only for
         spite at me.                             --H. Taylor.

Source : WordNet®

jeopardize
     v 1: pose a threat to; present a danger to; "The pollution is
          endangering the crops" [syn: {endanger}, {jeopardise}, {menace},
           {threaten}, {imperil}, {peril}]
     2: put at risk; "I will stake my good reputation for this"
        [syn: {venture}, {hazard}, {adventure}, {stake}]