hazardous
1. [ adjective ] involving risk or danger
Synonyms: risky venturous venturesome
Examples:

"skydiving is a hazardous sport" "extremely risky going out in the tide and fog" "a venturesome journey in wintertime" "a venturous enterprise"

Related terms: dangerous
Similar spelling:   hazardously
  hazard
  Hazzard
  hagard
  haggard
  Hazardia
  hazarding