TREASONOUS Synonyms: 32 Similar and Opposite Words

treasonous

adjective

Definition of treasonous

as in traitorous

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Examples are automatically compiled from online sources to show current usage. Read More Opinions expressed in the examples do not represent those of Merriam-Webster or its editors. Send us feedback.

Recent Examples of treasonous But in the shadows, amid growing unease at the bloodthirsty actions of the realm’s merciless Mad King, dissenters from his inner circle anxiously advance a treasonous plot. — Ryan Brennan april 3, Charlotte Observer, 3 Apr. 2026 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 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 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

Recent Examples of Synonyms for treasonous

Adjective

Telemachus’ lone contribution is killing Melanthius, the traitorous Ithacan farmhand, thus preventing him from continuing to arm the suitors.

— Marlow Stern, Variety, 17 July 2026
And at the very center of Hell is Satan himself, the traitorous Archangel Lucifer, depicted as a monstrous creature with wings and three heads.

— Keith Cooper, Space.com, 11 May 2026

Definition of traitorous

Adjective

That Russia’s oldest liberal party was effectively a seditious foreign agent.

— Ilan Berman, Forbes.com, 17 Aug. 2026
That was the extent of her involvement in the special counsel’s investigation, which led to more than 1,500 people being charged, with most convicted of trespassing, vandalism, assault or seditious conspiracy.

— Jay Weaver, Miami Herald, 7 Aug. 2026

Definition of seditious

Adjective

When planning paths and features, follow the contour of the slope rather than going straight up and down to slow water and create less treacherous access.

— Mary Marlowe Leverette, Southern Living, 11 Aug. 2026
The Hand of the Queen will have a treacherous road ahead, especially with the increasingly dictatorial Queen Rhaenyra (Emma D'Arcy), who was in no big rush to save Corlys from Ormund's clutches.

— Bryan Alexander, USA Today, 10 Aug. 2026

Definition of treacherous

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treason

treasonous

treasons

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“Treasonous.” Merriam-Webster.com Thesaurus, Merriam-Webster, https://www.merriam-webster.com/thesaurus/treasonous. Accessed 22 Aug. 2026.

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Synonyms of treasonous

adjective

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