perfidious
[per-fid-ee-uh s]
- deliberately faithless; treacherous; deceitful: a perfidious lover.
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Origin of perfidious
Synonyms
See more synonyms for perfidious on Thesaurus.comfalse, disloyal; unfaithful, traitorous.
Antonyms
faithful.
Dictionary.com Unabridged
Based on the Random House Unabridged Dictionary, © Random House, Inc. 2018
Examples from the Web for perfidiousness
Contemporary Examples
Third, Munayyer references Plan Dalet as an example of Zionist perfidiousness, a “military plan for the conquest of Palestine.”
Historical Examples
Saith Q. Curtius, Perfidiousness is a crime which no merits can mitigate.
A Christian DirectoryBaxter Richard
This was by perfidiousness to draw her into a snare to her undoing.
A Christian Directory (Part 2 of 4)Richard Baxter
Again he had a sad proof of the perfidiousness of Europeans.
The Life and Labours of the Rev. Samuel MarsdenSamuel Marsden
She once went so far as to say, that it was not superior discernment, which enabled her to suspect the perfidiousness of Walter.
The Loyalists, Vol. 1-3Jane West
Sabine's eyes opened upon new vistas of man's perfidiousness.
Cape Breton TalesHarry James Smith
perfidious
- guilty, treacherous, or faithless; deceitful
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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 perfidiousness
perfidious
adj.
1590s, from Latin perfidiosus "treacherous," from perfidia (see perfidy). Related: Perfidiously; perfidiousness.
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Online Etymology Dictionary, © 2010 Douglas Harper