13 letters · 16 points in Scrabble
noun the phenomenon of sediment or gravel accumulating
originEtymology tree English sediment Proto-Indo-European *-tis Proto-Indo-European *-Hō Proto-Indo-European *-tiHō Proto-Italic *-tiō Latin -tiō Latin -ātiōlbor. Old French -ationbor. Middle English -acioun English -ation English sedimentation From sediment + -ation.
Etymology from Wiktionary, CC BY-SA 3.0