14 letters · 20 points in Scrabble
adjective more than is needed, desired, or required
originFrom Latin superērogātōrius (“supererogatory”), from superērogātiō (“payment in addition”), from superērogō (“pay out over and above”), from super (“above”) + ērogō (“pay out, expend”); from ex (“out of, from”) + rogō (“ask; request”).
Etymology from Wiktionary, CC BY-SA 3.0