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nocuous

[nok-yoo-uh s]
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adjective
  1. likely to cause damage or injury; harmful; noxious.
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Origin of nocuous

1625–35; < Latin nocuus harmful, injurious, equivalent to noc(ēre) to harm + -uus deverbal adj. suffix; see -ous
Related formsnoc·u·ous·ly, adverbnoc·u·ous·ness, noun
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

British Dictionary definitions for nocuous

nocuous

adjective
  1. rare harmful; noxious
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Derived Formsnocuously, adverbnocuousness, noun

Word Origin

C17: from Latin nocuus, from nocēre to hurt
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

Word Origin and History for nocuous

adj.

1630s, "noxious, harmful," from Latin nocuus "harmful," from stem of nocere "to hurt, injure, harm" (see innocuous).

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Online Etymology Dictionary, © 2010 Douglas Harper