duplicitous

[doo-plis-i-tuhs, dyoo-]
adjective
marked or characterized by duplicity.

Origin:
1960–65; duplicit(y) + -ous

duplicitously, adverb
Dictionary.com Unabridged
Based on the Random House Dictionary, © Random House, Inc. 2014.
Cite This Source Link To Duplicitous
Collins
World English Dictionary
duplicity (djuːˈplɪsɪtɪ)
 
n , pl -ties
deception; double-dealing
 
[C15: from Old French duplicite, from Late Latin duplicitās a being double, from Latin duplex]
 
du'plicitous
 
adj

Collins English Dictionary - Complete & Unabridged 10th Edition
2009 © William Collins Sons & Co. Ltd. 1979, 1986 © HarperCollins
Publishers 1998, 2000, 2003, 2005, 2006, 2007, 2009
Cite This Source
Etymonline
Word Origin & History

duplicitous
1961, from duplicity + -ous.
Online Etymology Dictionary, © 2010 Douglas Harper
Cite This Source
Example sentences
Name calling, duplicitous plotting, coercing family and friends.
In this case acting as chair is a good opportunity to practice being
  supercilious and duplicitous.
The personalities emerge sharper, firmer and more duplicitous.
Authenticity is embracing the fact that we're necessarily duplicitous beings.
Copyright © 2014 Dictionary.com, LLC. All rights reserved.
  • Please Login or Sign Up to use the Recent Searches feature