The word "brace" is often used as a verb. It means to support or prepare. When people get ready for something difficult or dangerous, they brace themselves.
Leonard braced himself before the nurse gave him an injection.
Residents near the ocean are bracing for the arrival of a big storm.
Christine tried to brace herself just before her car ran into a tree.
Brace yourself for the heat. It’s going to be hot today.
Family members of the downed airplane are bracing themselves for bad news.
The word "brace" can also be used as a noun. In this case, a brace is used to provide structural support.
A brace was placed underneath the old building to help provide additional support for the foundation.
The braces on his legs help him walk.
Sheila is going to have the braces on her teeth taken off today. She’s so excited.
He’s wearing braces.