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noxious

[nok-shuh s] /ˈnɒk ʃəs/
adjective
1.
harmful or injurious to health or physical well-being:
noxious fumes.
2.
morally harmful; corrupting; pernicious:
a noxious plan to spread dissension.
Origin
1605-1615
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
Synonyms
1. hurtful, unwholesome, unhealthy, nocuous, detrimental, deleterious. 2. corruptive.
Antonyms
1, 2. harmless.
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Based on the Random House Dictionary, © Random House, Inc. 2014.
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British Dictionary definitions for noxiously

noxious

/ˈnɒkʃəs/
adjective
1.
poisonous or harmful
2.
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 noxiously

noxious

adj.

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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noxiously in Medicine

noxious nox·ious (nŏk'shəs)
adj.
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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