He's '(as) stubborn as a mule'. [=he's very/extremely stubborn]
She 'has a stubborn streak'. [=she is often stubborn]
She's wrong, but she's too 'stubborn' to admit it.
(..) to Jon Snow, not to her. They don't know her. The Free Folk don't know her. I've been up here a while, and I'm telling you, they're stubborn as goats. You want their loyalty, you have to earn it. [PEOPLE CHATTERING INDISTINCTLY] I sense that you're leading (..)2019 TvShow: Game of Thrones Title: Winterfell Season: 8 Episode 1