10 letters · 15 points in Scrabble
verb break down naturally through the action of biological agents
originEtymology tree Proto-Indo-European *gʷeyh₃-der. Ancient Greek βῐ́ος (bĭ́os) Ancient Greek βῐο- (bĭo-)der. English bio- English degrade English biodegrade From bio- + degrade.
Etymology from Wiktionary, CC BY-SA 3.0