fatuous

[fach-oo-uhs]
adjective
1.
foolish or inane, especially in an unconscious, complacent manner; silly.
2.
unreal; illusory.

Origin:
1625–35; < Latin fatuus silly, foolish, idiotic; see -ous

fatuously, adverb
fatuousness, noun


1. dense, dull, dim-witted. See foolish.
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World English Dictionary
fatuous (ˈfætjʊəs)
 
adj
complacently or inanely foolish
 
[C17: from Latin fatuus; related to fatiscere to gape]
 
'fatuously
 
adv
 
'fatuousness
 
n

Collins English Dictionary - Complete & Unabridged 10th Edition
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Dictionary.com's 21st Century Lexicon
Main Entry:  fatuous1
Part of Speech:  adj
Definition:  inanely foolish and unintelligent; stupid
Etymology:  Latin fatuus 'foolish'
Main Entry:  fatuous2
Part of Speech:  adj
Definition:  illusory; delusive
Etymology:  Latin fatuus 'foolish'
Dictionary.com's 21st Century Lexicon
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Etymonline
Word Origin & History

fatuous
c.1600, from L. fatuus "foolish, insipid," of uncertain origin. Related: Fatuously.
Online Etymology Dictionary, © 2010 Douglas Harper
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Example sentences
It no longer is fatuous to predict an astonishing productivity harnessed to a
  relative handful of workers.
Henry's portentous musings on the futility of war seem fatuous beside his
  clear-eyed account of how war looks.
It's fatuous to book flight tickets through online travel firms without having
  a look at the respective airline's fare.
If another reason is to effect education reform, the idea is fatuous.
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