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Definitions

treachery

[trech-uh-ree] / ˈtrɛtʃ ə ri /
NOUN
disloyalty, dishonesty
Synonyms
STRONGEST
betrayal infidelity treason
STRONG
bunco corruption disaffection dodge double-dealing duplicity faithlessness fake falseness flimflam perfidiousness perfidy put on racket scam sellout spoof whitewash
WEAK
dirty dealing dirty pool dirty trick dirty work double cross fast shuffle grift recreancy shell game skin game stab in the back sweet-talk treacherousness two-timing
Antonyms
STRONGEST
faithfulness fidelity loyalty
STRONG
forthrightness harmony honesty truthfulness
WEAK
constancy devotion love

Example Sentences

Examples are provided to illustrate real-world usage of words in context. Any opinions expressed do not reflect the views of Dictionary.com.

Most of the unhappy denizens of Dante’s imagined hell are being eternally tormented for specific moral crimes in categories covering lust, gluttony, greed, anger, heresy, violence, fraud and treachery.

From Salon • Mar. 8, 2026

It’s a sprawling tale of divine corruption and human treachery that ends with the world being purified by fire and flood.

From The Wall Street Journal • Feb. 12, 2026

Roundtables are full of treachery, tears and... shocking spelling.

From BBC • Jan. 24, 2025

“The treachery of your tears is no use to fight injustice,” read one.

From New York Times • Jun. 5, 2024

There was darkness in her, and treachery, that much she knew.

From "Strange the Dreamer" by Laini Taylor

From Roget's 21st Century Thesaurus, Third Edition Copyright © 2013 by the Philip Lief Group.