Source : Webster's Revised Unabridged Dictionary (1913)

Venturous \Ven"tur*ous\, a. [Aphetic form of OE. aventurous. See
   {Adventurous}, {Venture}, n.]
   Daring; bold; hardy; fearless; venturesome; adveturous; as, a
   venturous soldier. --Spenser.

         This said, he paused not, but with venturous arm He
         plucked, he tasted.                      --Milton.
   -- {Ven"tur*ous*ly}, adv. -- {Ven"tur*ous*ness}, n.

Source : WordNet®

venturous
     adj 1: involving risk or danger; "skydiving is a hazardous sport";
            "extremely risky going out in the tide and fog"; "a
            venturesome journey in wintertime"; "a venturous
            enterprise" [syn: {hazardous}, {risky}, {venturesome}]
     2: disposed to venture or take risks; "audacious visions of the
        total conquest of space"; "an audacious interpretation of
        two Jacobean dramas"; "the most daring of contemporary
        fiction writers"; "a venturesome investor"; "a venturous
        spirit" [syn: {audacious}, {daring}, {venturesome}]