stubborn, pigheaded
Ella es cabezota.
She is stubborn.
Mary es demasiado cabezota para disculparse.
Mary is too stubborn to apologize.
Por cabezota, ¡póngase cara a la pared!
For being so stubborn, stand facing the wall!
— Las diabólicas (1955)
Tom es tan cabezota como Mary.
Tom is as stubborn as Mary.