Hazardous, a.
Etymology: [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.
Shades of meaning
Fernald has no entry of its own for hazardous; he lists it under precarious.
He lists it without comment; the entries above explain its neighbors.