hazardous

Meanings

1. 1
   adj

   involving risk or danger

   skydiving is a hazardous sport

2. 2
   adj

   Risky; dangerous; with the nature of a hazard.

   But out of sight is out of mind. And that[…]means that many old sewers have been neglected and are in dire need of repair. If that repair does not come in time, the result is noxious and potentially hazardous.

3. 3
   adj

   Of or involving chance.

Etymology

From Middle French hasardeux, equivalent to hazard + -ous.