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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And remember too, putting your name on the Declaration of Independence was treasonous. Mo Rocca, CBS News, 22 Feb. 2026 But in the shadows, amid growing unease at the blood-thirsty actions of the realm’s merciless Mad King, dissenters from his inner circle anxiously advance a treasonous plot. Naman Ramachandran, Variety, 18 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 The president seemed to be heading toward political exile, his election claims destined to be inscribed in history as treasonous lies. Jamie Thompson, The Atlantic, 6 Jan. 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 6 Mar. 2026.

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