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Definition of treasonable

treasonable

/ˈtɹiːzənəbəl/
trea · son · a · ble
Adverb:treasonably
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treasonable Lexical Profile

treasonable Game Scores & Validity

• adjective

1

Involving, constituting, or characteristic of the crime of betraying one's country or sovereign.

Example

"The court ruled that leaking the classified diplomatic correspondence to a foreign power was a treasonable offense."

Synonyms
View all synonyms for treasonable
Antonyms
View all antonyms for treasonable

Word Nuance & Usage

While often used interchangeably with 'treasonous', 'treasonable' is preferred in formal and legal contexts to describe acts or offenses that legally constitute treason, whereas 'treasonous' more broadly describes people, motives, or general betrayal.

• Rhymes for treasonable

• Nearby Words

treadmill
treadwheel
treason
treasonable
treasonably
treasonous
treasure

Word Origin & Etymology

First recorded in the late 14th century, formed in Middle English from 'treason' (via Anglo-French 'tresun', from Latin 'traditio', meaning a handing over or betrayal) combined with the suffix '-able'.

Cite this Entry

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