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noxious

/ˈnɒkʃəs/ · nox·i·us
adjective
  1. Harmful; injurious. The noxious fumes from the factory caused widespread respiratory problems in the nearby town.
  2. Causing or tending to cause harm or injury. The noxious effects of the toxic waste on the ecosystem were devastating.
Did you know? The word 'noxious' has been used in various contexts, including environmental science, medicine, and law, to describe substances or actions that cause harm or injury.
Written by Lexi Wordsworth, Dictionary Editor 0 lookups Added Jul 17, 2026