The noun "hazard" means something dangerous, and the adjective hazardous refers to anything that involves danger. A golf course with lots of sand traps is especially hazardous for golfers. That's why those traps are called hazards.

If your car blows a tire in the middle of the night, make sure to turn on your hazard lights. Being invisible to other drivers is hazardous to everyone, especially yourself. Life is, by definition, hazardous. It's full of dangers, both obvious and otherwise. Acknowledge that fact and keep going anyway. If you spend all your time focusing on what's hazardous, you end up missing all the wonderful things in life.

Definitions of hazardous
  1. adjective
    involving risk or danger
    “skydiving is a hazardous sport”
    synonyms: risky, wild
    dangerous, unsafe
    involving or causing danger or risk; liable to hurt or harm
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