"skilled form of horseback riding performed in exhibitions and competitions," 1936, from French dressage, from dresser "to train, drill" (see dress (v.)). Middle English had dress (v.) in the sense of "to train or break in" a horse or other animal (c. 1400), but it died out.
"to revoke (a command or order)," early 15c., contremaunden, from Anglo-French and Old French contremander "reverse an order or command" (13c.), from contre- "against" (see contra (prep., adv.)) + mander, from Latin mandare "to order" (see mandate (n.)). Related: Countermanded; countermanding. As a noun, "a contrary order," 1540s.