The word encierro comes from the Spanish verb encerrar -- to shut in -- .
The word encierro refers to the process of taking the bulls from the Corralillos de Santo Domingo to the corrals of the bullring , where they remain until the bullfight .
The word encierro comes from the Spanish verb encerrar -- to shut in -- and refers to the process of taking the bulls from the Corralillos de Santo Domingo to the corrals of the bullring , where they remain until the bullfight .