4 letters · 5 points in Scrabble
originEtymology tree English register 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 registration English -o English rego From registration + -o (diminutive suffix).
Etymology from Wiktionary, CC BY-SA 3.0