10 letters · 21 points in Scrabble
verb make worse
verb exasperate or irritate
originFirst attested in 1660; borrowed from Latin exacerbātus, perfect passive participle of Latin exacerbō (“to provoke”) (see -ate (verb-forming suffix)), from ex- (“out of; thoroughly”) + acerbō (“to embitter, harshen or worsen”).
Etymology from Wiktionary, CC BY-SA 3.0