ferrocarril
/ferokaˈril/ · B2 · noun · m
railroad track
🚂🛤️ ferro + carril = iron + rail, so an iron road for trains
Ferro- is the iron root you know from ferrous and ferric. Carril means rail or lane, and it is related to carro, cart. Iron rails for carts gives you the railway, the same idea as German Eisenbahn, iron road.