Translation of "Necio" in English

Tú eres bien necio, ¿no?

You're pretty stubborn, aren't you.

Hijo sabio, alegría del padre; hijo necio, disgusto de su madre.

A wise son maketh a glad father: but a foolish son is the heaviness of his mother.

Aquél que busca la sabiduría es un hombre sabio; aquél que piensa que la ha encontrado es un necio.

He who seeks wisdom is a wise man, he who thinks he's found it is a fool.