6 letters · 8 points in Scrabble
noun a mixture of sulfides that forms when sulfide metal ores are smelted
noun the property of having little or no contrast; lacking highlights or gloss
verb change texture so as to become matted and felt-like
originBorrowed from German Mattes, from a vernacular form of Matthias (“Matthew”).
Etymology from Wiktionary, CC BY-SA 3.0