11 letters · 20 points in Scrabble
noun a statement that makes something comprehensible by describing the relevant structure or operation or circumstances etc.
noun thought that makes something comprehensible
noun the act of explaining; making something plain or intelligible
originFrom Latin explanatio (“an explanation, interpretation”), from explanare (“explain”); see explain. Morphologically explain + -ation. Displaced native Old English racu.
Etymology from Wiktionary, CC BY-SA 3.0