autopista
/autoˈpista/ · B1 · noun · f
expressway
🛣️🚗 auto + pista = car + track: a track built for cars
Auto is short for automóvil (car), and pista means track or lane, as in a racetrack or runway. Put them together and you get a high-speed road for cars. It is feminine because pista is: la autopista.