[doo-plis-i-tuh s, dyoo-]
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Origin of duplicitous

First recorded in 1960–65; duplicit(y) + -ous
Related formsdu·plic·i·tous·ly, adverb
Dictionary.com Unabridged Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018

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Contemporary Examples of duplicitous

Word Origin and History for duplicitous

1831; see duplicity + -ous.

Online Etymology Dictionary, © 2010 Douglas Harper