8 letters · 9 points in Scrabble
noun an illegal action inciting resistance to lawful authority and tending to cause the disruption or overthrow of the government
originFrom Old French sedicion, from Latin sēditiō (“sedition, discord”), from sēd- (“apart”) (an alternative form of sē-) + itiō (“going”).
Etymology from Wiktionary, CC BY-SA 3.0