The Collaborative International Dictionary of English v.0.48:

Jeopardous \Jeop"ard*ous\, a.
   Perilous; hazardous.
   [1913 Webster]

         His goodly, valiant, and jeopardous enterprise.
                                                  --Fuller.
   -- Jeop"ard*ous*ly, adv. --Huloet.
   [1913 Webster]