Questions & Answers about Mi hermano es terco y no escucha a nadie.
Why is there an a before nadie?
This is the "personal a". In Spanish, when the direct object of a verb is a person, it must be preceded by a. Even though nadie (nobody/anyone) isn't a specific person, it refers to people, so it still requires the personal a. Notice also the mandatory double negative (no escucha a nadie) because the negative pronoun comes after the verb.
Could I say no oye a nadie instead of no escucha a nadie?
Are there other common ways to say "stubborn" in Spain besides terco?
Terco is perfectly natural and widely used. However, in casual, everyday conversation in Spain, you will very frequently hear cabezota (pig-headed) or testarudo.
How would I apply this lesson's grammar to say "No matter how stubborn my brother is..."?