11 letters · 17 points in Scrabble
noun a farewell oration (especially one delivered during graduation exercises by an outstanding member of a graduating class)
noun the act of saying farewell
originFirst attested in 1614; borrowed from New Latin valedictiō, from valedīcō (“to bid farewell”) + -tiō, from valē (“farewell, so long”) + dīcō (“to say”). By surface analysis, valedict + -ion.
Etymology from Wiktionary, CC BY-SA 3.0