in·noc·u·ous

[ih-nok-yoo-uhs]
adjective
1.
not harmful or injurious; harmless: an innocuous home remedy.
2.
not likely to irritate or offend; inoffensive; an innocuous remark.
3.
not interesting, stimulating, or significant; pallid; insipid: an innocuous novel.

Origin:
1590–1600; < Latin innocuus. See in-3, nocuous

in·noc·u·ous·ly, adverb
in·noc·u·ous·ness, in·no·cu·i·ty [in-uh-kyoo-i-tee] , noun
un·in·noc·u·ous, adjective
un·in·noc·u·ous·ly, adverb
un·in·noc·u·ous·ness, noun
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2013.
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Collins
World English Dictionary
innocuous (ɪˈnɒkjʊəs) [Click for IPA pronunciation guide]
 
adj
having little or no adverse or harmful effect; harmless
 
[C16: from Latin innocuus harmless, from in-1 + nocēre to harm]
 
in'nocuously
 
adv
 
in'nocuousness
 
n
 
innocuity
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Dictionary.com's 21st Century Lexicon
Main Entry:  innocuous1
Part of Speech:  adj
Definition:  harmless; innoxious
Etymology:  Latin in- + nocere 'to injure'
Main Entry:  innocuous2
Part of Speech:  adj
Definition:  unlikely to arouse strong feeling; insipid
Etymology:  Latin in- + nocere 'to injure'
Dictionary.com's 21st Century Lexicon
Copyright © 2003-2013 Dictionary.com, LLC
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Etymonline
Word Origin & History

innocuous
1598, from L. innocuus "harmless," from in- "not" + nocuus "hurtful," from root of nocere "to injure, harm," from *nok-s-, suffixed form of PIE base *nek- "death" (see noxious).
Online Etymology Dictionary, © 2010 Douglas Harper
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American Heritage
Medical Dictionary

innocuous in·noc·u·ous (ĭ-nŏk'y&oomacr;-əs)
adj.
Having no adverse effect; harmless.

The American Heritage® Stedman's Medical Dictionary
Copyright © 2002, 2001, 1995 by Houghton Mifflin Company. Published by Houghton Mifflin Company.
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Example sentences
They also read too much political import and intrigue into small, innocuous
  decisions.
Others were utterly innocuous, such as deciding whether to take a train or a
  bus to work.
It sounds innocuous enough to say that you're making this data more accessible.
Ultrasonic waves are usually innocuous, bouncing off tissue.
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