Empecinado (en. Stubborn)
/em.pe.θiˈna.ðo/
Slang Meanings
Slang Meaning: To be very headstrong
Slang Example: You can't convince him, he is very headstrong.
No puedes convencerlo, es muy cabezón.
Slang Meaning: To have a strong will
Slang Example: He always has a strong will about his ideas; there's no way to change his mind.
Siempre tiene un beto con sus ideas, no hay manera de cambiarle la opinión.