8 letters · 10 points in Scrabble
originEtymology tree Proto-Indo-European *tréyes Proto-Indo-European *tri- Proto-Italic *tri- Latin tri-der. English tri- Proto-Indo-European *m(y)ewh₁-der. Proto-Italic *moweō Latin moveō Proto-Indo-European *-tōr Proto-Italic *-tōr Latin -tor Latin mōtorder. Middle English motour English motor English trimotor From tri- + motor.
Etymology from Wiktionary, CC BY-SA 3.0