10 letters · 12 points in Scrabble
adjective characterized by unrest or disorder or insubordination
originFrom Old French tumultuous (modern French tumultueux), from Latin tumultuōsus (“restless, turbulent”), from tumultus (“disturbance, uproar, violent commotion, tumult; agitation, disturbance, excitement”) + -ōsus (suffix meaning ‘full of, prone to’ forming adjectives from nouns).
Etymology from Wiktionary, CC BY-SA 3.0