Hazardous

Haz"ard*ous (-ŭs), a. [Cf. F. hasardeux.] Exposed to hazard; dangerous; risky.

To enterprise so hazardous and high!
Milton.

Syn. -- Perilous; dangerous; bold; daring; adventurous; venturesome; precarious; uncertain.

-- Haz"ard*ous*ly, adv. -- Haz"ard*ous*ness, n.