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Definition of treachery

treachery

/ˈtrɛtʃ.ər.i/
treach · er · y
Adverb:treacherously
•
Plural:treacheries
•
Adjective:treacherous
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treachery Lexical Profile

treachery Game Scores & Validity

• noun

1

A deliberate betrayal of trust or faith; deceptive or disloyal conduct, or an instance of such behavior.

Example

"The historical drama revolves around the political treachery of a trusted royal advisor."

Synonyms
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Antonyms
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• Rhymes for treachery

• Nearby Words

treacherous
treacherously
treacherousness
treachery
treacle
tread
treadmill

Word Origin & Etymology

Borrowed into Middle English from Old French 'trecherie' (deceit, trickery), derived from the verb 'trechier' (to cheat or trick), likely of Frankish or Germanic origin.

Usage Trend

Historical frequency of usage in published text.

180019102020
Data source: Google Books Ngram Viewer

Cite this Entry

Wordmom. (2026). Definition of Treachery. In Wordmom Dictionary. Retrieved Nov 5, 2026, from https://wordmom.com/dictionary/treachery
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