bronco
n. C1 Advanced US //ˈbɹɑŋkoʊ// UK //bɹˈɒnkəʊ// bron·co
n. a young horse that has not been trained yet. It is often used to describe a horse that is wild and difficult to control.
n. a young, untrained horse, typically one that is wild or difficult to handle. Often used in the context of rodeo sports to refer to a specific breed or a horse being broken in.
The cowboy tried to calm the wild bronco.
During the rodeo, the bronco bucked the rider off the horse several times before the competition ended.
The rancher spent months working with the bronco to ensure it was safe enough for the inexperienced stable hands to manage during the summer season.
Borrowed from Spanish bronco (“rough”), 19th c. which in Mexican usage also describes a horse that has not been broken and is still wild.