9 Grammatical Pitfalls


[nok-shuh s] /ˈnɒk ʃəs/
harmful or injurious to health or physical well-being:
noxious fumes.
morally harmful; corrupting; pernicious:
a noxious plan to spread dissension.
Origin of noxious
1605-15; < Latin noxius harmful, hurtful, injurious, equivalent to nox(a) harm, hurt, injury (akin to nocēre to do harm, inflict injury; see innocent) + -ius -ious
Related forms
noxiously, adverb
noxiousness, noun
1. hurtful, unwholesome, unhealthy, nocuous, detrimental, deleterious. 2. corruptive.
1, 2. harmless. Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2015.
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Examples from the web for noxious
  • These chemicals can make plants smell good or, alternately, noxious.
  • She got him to eat his peas, whenever the noxious legume appeared on his plate, by paying him $5.
  • The noxious gas was the result of the impact.
  • The invaders meet any foe aggressively, releasing noxious chemicals during battle.
  • The airtight chamber could insulate occupants from noxious fumes and supply 15 men with food, air and water for 96 hours.
  • Fingers crossed that I haven't caught whatever noxious mixture of germs was incubating in my car during the journey out.
  • She must avoid the noxious preening that taints so many memoirs of their authors' misspent youth.
  • It releases lots of soot and various noxious chemicals as it burns, and so has fallen out of favour in many Western countries.
  • Business and politics too often overlap, often in a noxious cocktail with local and foreign spooks and crooks.
  • They surround their crops with rows of chili peppers, whose smell is noxious to elephants.
British Dictionary definitions for noxious


poisonous or harmful
harmful to the mind or morals; corrupting
Derived Forms
noxiously, adverb
noxiousness, noun
Word Origin
C17: from Latin noxius harmful, from noxa injury
Collins English Dictionary - Complete & Unabridged 2012 Digital Edition
© William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009, 2012
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Word Origin and History for noxious

c.1500, from Latin noxius "hurtful, injurious," from noxa "injury, hurt, damage entailing liability" (related to nocere "to hurt," and to nex "slaughter"), from PIE *nek-ro-, causative form of root *nek- "death" (see necro-).

Online Etymology Dictionary, © 2010 Douglas Harper
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noxious in Medicine

noxious nox·ious (nŏk'shəs)
Harmful to living things; injurious to health.

nox'ious·ness n.
The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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