treasonous

adjective

trea·​son·​ous ˈtrē-zə-nəs How to pronounce treasonous (audio)
ˈtrēz-nəs
Synonyms of treasonousnext

Examples of treasonous in a Sentence

Recent Examples on the Web
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Set against the wave of democratization and cultural modernization that swept through South Korea in the early 1990s, the series centers on a middle-class family concealing a treasonous secret. Naman Ramachandran, Variety, 25 Mar. 2026 And remember too, putting your name on the Declaration of Independence was treasonous. Mo Rocca, CBS News, 22 Feb. 2026 After all, who doesn’t hate Nazi, fascist, racist, white supremacist, authoritarian, extremist, cultist, misogynist, treasonous tyrants? Chris Roemer, Baltimore Sun, 12 Feb. 2026 The paper attacked rivals like the Guardian and the Daily Mirror as treasonous for being insufficiently enthusiastic about the war. Andrew O’Hagan, New Yorker, 2 Feb. 2026 See All Example Sentences for treasonous

Word History

First Known Use

1593, in the meaning defined above

Time Traveler
The first known use of treasonous was in 1593

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Cite this Entry

“Treasonous.” Merriam-Webster.com Dictionary, Merriam-Webster, https://www.merriam-webster.com/dictionary/treasonous. Accessed 4 Apr. 2026.

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