11 letters · 15 points in Scrabble
adjective characterized by violent emotions or behavior
adjective (of the elements) as if showing violent anger
originFrom Late Middle English tempestious, tempestous, tempestuous (“stormy, turbulent, tempestuous”), from Anglo-Norman tempestous, and Old French tempesteus, tempestos, tempestous, tempestuose (modern French tempétueux), and directly from its etymon Latin tempestuōsus (“stormy, turbulent, tempestuous; impetuous”), from tempestās, tempestūs (“point or period of time; season; weather, specifically bad…
Etymology from Wiktionary, CC BY-SA 3.0