10 letters · 10 points in Scrabble
adjective having the character of, or characteristic of, a traitor
originEtymology tree English treason Proto-Indo-European *h₃ed- Proto-Indo-European *-os Proto-Indo-European *h₃édosder.? Proto-Italic *-ōtsos or *-otsos Latin -ōsus Old French -usbor. Middle English -ous English -ous English treasonous From treason + -ous.
Etymology from Wiktionary, CC BY-SA 3.0