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  1. given to deceiving: A deceitful person cannot keep friends for long.
  2. intended to deceive; misleading; fraudulent: a deceitful action.
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Origin of deceitful

late Middle English word dating back to 1400–50; see origin at deceit, -ful
Related formsde·ceit·ful·ly, adverbde·ceit·ful·ness, nounun·de·ceit·ful, adjective

Synonyms for deceitful

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Antonyms for deceitful

1. honest. 2. genuine.
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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British Dictionary definitions for deceitful


  1. full of deceit
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Derived Formsdeceitfully, adverbdeceitfulness, noun
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 deceitful


mid-15c., from deceit + -ful. Related: Deceitfully; deceitfulness.

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Online Etymology Dictionary, © 2010 Douglas Harper