boom (spar extending the foot of a sail) · crupper (strap looped under a horse’s tail) · defence (tactics employed to prevent the other team from scoring)
crupper (a leather strap looped under a horse's tail)
köken: From Proto-Mongolic *kudurga (“crupper”), from Proto-Turkic *kudruk (“tail”), see also Proto-Tungusic *xürgü (“tail”). Compare East Yugur ghudurgha, Turkish kuyruk, Old Turkic 𐰴𐰆𐰑𐰺𐰆𐰸 (qudruq), Evenki ирги (irgi), Ulch худю.