9 letters · 21 points in Scrabble
noun profane or obscene expression usually of surprise or anger
noun a word or phrase conveying no independent meaning but added to fill out a sentence or metrical line
originFrom Late Latin explētīvus (“serving to fill out”), from Latin explētus, the perfect passive participle of expleō (“fill out”), itself from ex (“out, completely”) + *pleō (“fill”).
Etymology from Wiktionary, CC BY-SA 3.0