9 letters · 14 points in Scrabble
noun a scholar who writes explanatory notes on an author (especially an ancient commentator on a classical author)
originFrom Late Latin scholiasta, from Byzantine Greek σχολιαστής (skholiastḗs), from σχολιάζειν (skholiázein), from Ancient Greek σχόλιον (skhólion).
Etymology from Wiktionary, CC BY-SA 3.0