Etymology

biohazard

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Today it means: A biological hazard: a source of risk due to some biological factor such as bacteria or human waste. Full definition →

English hazard ← Ancient Greek βῐο- (bĭo-) ← Proto-Indo-European *gʷeyh₃-
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The story

  1. Proto-Indo-European*gʷeyh₃-
  2. Ancient Greekβῐ́ος (bĭ́os)
  3. Ancient Greekβῐο- (bĭo-)
  4. Englishbio-
  5. Englishhazard
  6. English todaybiohazard

From bio- + hazard.

Etymology from Wiktionary, CC BY-SA 4.0.