The quality of being brave or heroic; a noun form of the adjective 勇敢. Used to describe courageous acts or character.
His bravery moved everyone.
消防士の勇敢さに感謝します。
We are grateful for the firefighters' heroism.
Derived from the adjective 勇敢 (brave) by adding the nominalizing suffix さ, which turns an adjective into a noun expressing the degree or quality of that adjective.