9 letters · 15 points in Scrabble
noun a steep descent of the water of a river
originFrom Middle English waterfal, waterfalle, from Old English wæterġefeall (“waterfall”), equivalent to water + fall. Cognate with West Frisian wetterfal (“waterfall”), Dutch waterval (“waterfall”), German Wasserfall (“waterfall”), Swedish vattenfall (“waterfall”).
Etymology from Wiktionary, CC BY-SA 3.0