8 letters · 8 points in Scrabble
verb purify by means of a ritual; also used in post-Communist countries to refer to the political cleansing of former officials
originFrom Latin lustrātus (“lustrated”), perfect passive participle of lustrō (see -ate (verb-forming suffix)), from lustrum (“ritual purification”) + -ō (first conjugation verb-forming suffix), q.v. In reference to imparting luster, further via senses of Middle French lustre, from Old Italian lustro.
Etymology from Wiktionary, CC BY-SA 3.0