cimarrón

feral (having returned to the wild); rural; campestral; of a wild cultivar; unsweetened

“Y entonces comprendí que así como el caballo americano, lo mismo que el toro, que corre libre por montes y llanos, no es el caballo salvaje, sino el caballo cimarrón, el caballo doméstico vuelto a la vida bravía y salvaje, […]” — And then I realised that, like the american horse, and the same for the bull, that runs free around the mountains and plains, isn’t the wild horse, but rather the feral horse, the domestic horse that returned to a wild and savage life, […]

Either a native Spanish formation from cima (“summit, peak”), referring to unruly slaves who escaped to seek refuge in the mountains, or a borrowing from Taíno símaran (“wild”) (like a stray arrow), from símara (“arrow”).