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.
(..) if we stay close. Bet you freeze to death before I do. Bet your life. Think they're out looking for you? - Yes. - Think they'll find you? Yes. You're brave. Stupid, but brave. We start again at first light. Get some sleep. Stop moving. I'm just trying to get comfortable. Stop it! - Was I? (..)2012 TvShow: Game of Thrones Title: The Old Gods and the New Season: 2 Episode 6