treasonable

[ tree-zuh-nuh-buh l ]
/ ˈtri zə nə bəl /

adjective

of the nature of treason.
involving treason; traitorous.

Origin of treasonable

First recorded in 1325–75, treasonable is from the Middle English word tresonabill. See treason, able

OTHER WORDS FROM treasonable

Example sentences from the Web for treasonable