She tried to 'put on/up a brave face/front' [=she tried to appear brave or calm] despite the pain of the injury.
The company was slow to enter the 'brave new world' of computer technology.
I had to 'brave the elements' [=go out in bad weather] to get to work.
(..) - I don't trust you. - I've given you my word. - I still don't trust you. But you have a deal. Give me that, before you lose a finger. She killed my brave Liam with just the palm of her hand. Then she drew a dagger from the side of her, she cannot be killed. But there's more. The princess is alive. (..)2012 Snow White and the Huntsman