10 letters · 13 points in Scrabble
noun a harness strap that connects the nose piece to the girth; prevents the horse from throwing back its head
noun spar under the bowsprit of a sailboat
originFrom Middle French martingale, from Occitan martegalo, feminine form of martegal, an inhabitant of Martigues, which is from Latin maritima. Possibly merged with Spanish almártaga. The meaning in gambling may come from an old usage of "à la martingale" to mean absurdly, foolishly.https://people.math.harvard.edu/~ctm/home/text/class/sem/html/home/notes/martingales/martingales.pdf
Etymology from Wiktionary, CC BY-SA 3.0