treach·​ery | \ ˈtre-chə-rē How to pronounce treachery (audio) , ˈtrech-rē \
plural treacheries

Definition of treachery

1 : violation of allegiance or of faith and confidence : treason
2 : an act of perfidy or treason

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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 But infighting and treachery toppled their government less than a week ago. The Economist, "Malaysia’s new prime minister helps overturn an election result," 1 Mar. 2020 And the movie does heavily echo his themes of suburban treachery and desperation, the pettiness of small-town politics and curdling of misguided dreams. Leah Greenblatt,, "Hugh Jackman aces a school scandal in HBO’s acid satire Bad Education: Review," 24 Apr. 2020 Starting October 3 Feel the Love The most popular story ever of royal intrigue and treachery returns to the Opera House., "Cooking Chatter," 28 Sep. 2018 In this formulation, their descendants must, forever, pay for that treachery—sometimes by being locked behind ghetto walls, other times with their lives. Pamela S. Nadell, Quartz, "A history of American antisemitism," 12 Nov. 2019 Yet Thorne’s urgency to meet compels her to dig into his recent past. Here begins a tantalizing, suspenseful odyssey of frustration, deceit, treachery, torture, hope, despair and ingenious sleuthing. Washington Post, "There’s no shortage of novels about what happens when the Earth stops spinning. ‘The Last Day’ may set a new standard.," 10 Feb. 2020 This was a shocking step for the show, which prides itself on being a free-for-all of deceit, mind games and treachery. Noam Cohen, Wired, "The TV Show ‘Survivor’ Can Help Us Understand Impeachment," 17 Dec. 2019 Unlike a product of Bollywood, however, this protracted tale of treachery, hubris and midnight manoeuvring has real consequences for the state’s 112m people. The Economist, "Political drama has gripped the home state of Bollywood," 29 Nov. 2019 In 1997, the prince and the princess told The Times of London that their mother, in a final gesture of protest against the treachery of Britain and India, had killed herself by drinking a poison mixed with crushed diamonds and pearls. Ellen Barry, New York Times, "The Jungle Prince of Delhi," 22 Nov. 2019

These example sentences are selected automatically from various online news sources to reflect current usage of the word 'treachery.' Views expressed in the examples do not represent the opinion of Merriam-Webster or its editors. Send us feedback.

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First Known Use of treachery

13th century, in the meaning defined at sense 1

History and Etymology for treachery

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

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Time Traveler for treachery

Time Traveler

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

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Statistics for treachery

Last Updated

16 May 2020

Cite this Entry

“Treachery.” Dictionary, Merriam-Webster, Accessed 27 May. 2020.

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More Definitions for treachery


How to pronounce treachery (audio)

English Language Learners Definition of treachery

: harmful things that are done usually secretly to a friend, your own country, etc.
: an act of harming someone who trusts you


treach·​ery | \ ˈtre-chə-rē How to pronounce treachery (audio) \
plural treacheries

Kids Definition of treachery

1 : the behavior of a person who betrays trust or faith a tale of treachery and revenge
2 : an act or instance of betraying trust or faith She was hurt by her friend's treacheries.

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