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

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 In art, Malinche begins to be shown as Eve to Cortés’ Adam, with all the implications of treachery that this biblical metaphor evokes. Los Angeles Times, 3 May 2022 Gun battles, life-endangering treachery, and duffel bags of cash—the pulp grist that had always been on the show’s periphery—were now central. Spencer Kornhaber, The Atlantic, 14 Apr. 2022 Art hanging on the wall of the front room displays images of Ukrainian patriotism or Russian treachery. Phil Mccausland, NBC News, 14 Apr. 2022 Lai Tek’s successor, the long-serving Chinese Malay communist Chin, uncovered the secretary-general’s treachery and ordered his death shortly after World War II. Richard Collett, Smithsonian Magazine, 28 Mar. 2022 The author follows her subjects not only to the world’s flash points but also into their bedrooms and onto their psychoanalysts’ couches, documenting their news-chasing heroism and romantic treachery. Edward Kosner, WSJ, 17 Mar. 2022 Putin, however, saw it as proof of the West’s treachery. Kim Ghattas, The Atlantic, 6 Mar. 2022 Just about everyone is on board with making Russian President Vladimir Putin pay for his treachery! Damon Linker, The Week, 1 Mar. 2022 Such letters have since become a symbol of the female treachery that can damage a man as deeply as the wartime loss of life or limb. Charlotte Gray, WSJ, 9 Jan. 2022 See More

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.

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

Learn More About treachery

Time Traveler for treachery

Time Traveler

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

See more words from the same century

Dictionary Entries Near treachery




See More Nearby Entries 

Statistics for treachery

Last Updated

11 May 2022

Cite this Entry

“Treachery.” Dictionary, Merriam-Webster, Accessed 22 May. 2022.

Style: MLA
MLACheck Mark Icon ChicagoCheck Mark Icon APACheck Mark Icon Merriam-WebsterCheck Mark Icon

More Definitions for treachery


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.

More from Merriam-Webster on treachery

Nglish: Translation of treachery for Spanish Speakers

Britannica English: Translation of treachery for Arabic Speakers


Test Your Vocabulary

Name That Color

  • a light greenish blue color
  • Name that color:
How Strong Is Your Vocabulary?

Test your vocabulary with our 10-question quiz!

Universal Daily Crossword

A daily challenge for crossword fanatics.

Love words? Need even more definitions?

Subscribe to America's largest dictionary and get thousands more definitions and advanced search—ad free!