treachery

noun

treach·​ery ˈtre-chə-rē How to pronounce treachery (audio)
ˈtrech-rē
plural treacheries
1
: violation of allegiance or of faith and confidence : treason
2
: an act of perfidy or treason

Examples of treachery in a Sentence

a tale of treachery and revenge was furious that she revealed his secret and never forgave her for the treachery
Recent Examples on the Web
Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.
The six-parter, to debut July 14, follows six groups of friends, and six historical cases of murder and treachery among them. Etan Vlessing, HollywoodReporter, 19 June 2025 But amid the bloodbaths and treacheries, Westeros still penciled in time for a little romance — some more compelling than others (Jon and Ygritte > Jon and Daenerys). Tyler Aquilina, EW.com, 17 Apr. 2025 In true Christie fashion, the Tressilian reunion inevitably leads to murder, familial treachery, and a labyrinthine hunt for the killer. Erik Morse, Vogue, 15 Apr. 2025 That’s the treachery of this world, that’s the trap. Lauren Coates, Variety, 24 May 2025 See All Example Sentences for treachery

Word History

Etymology

Middle English trecherie, from Anglo-French, from trecher, tricher to deceive, from Vulgar Latin *triccare — more at trick entry 1

First Known Use

13th century, in the meaning defined at sense 1

Time Traveler
The first known use of treachery was in the 13th century

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Cite this Entry

“Treachery.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/treachery. Accessed 30 Jun. 2025.

Kids Definition

treachery

noun
treach·​ery ˈtrech-(ə-)rē How to pronounce treachery (audio)
plural treacheries
1
: violation of allegiance or of faith and confidence : treason
2
: an act of treason

More from Merriam-Webster on treachery

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