10 letters · 22 points in Scrabble
adjective serving to expound or set forth
originEtymology tree English exposit(ion) Proto-Indo-European *-tōr Proto-Italic *-tōr Latin -tor Proto-Indo-European *-yós Proto-Italic *-ios Old Latin -ios Latin -ius Latin -tōriusder. Middle English -orie English -ory English expository From exposit(ion) + -ory.
Etymology from Wiktionary, CC BY-SA 3.0