Plural of bronco: wild or partially trained horses, especially ones that buck and resist being ridden.
From Spanish 'bronco' meaning wild or rough, possibly from Latin 'bruncus'. The word entered English via the American Southwest during Spanish colonial and cowboy eras.
The Denver Broncos football team named themselves after these wild horses, but the Spanish word 'bronco' originally just meant 'rough'—it was applied to untamed horses because they were, well, rough to ride.
Complete word intelligence in one call. Free tier — 50 lookups/day.