bravery

Bravery was borrowed from Middle French braverie, from braver ("to brave"), or from Italian braveria, from bravare ("to brave"). By surface analysis in English, it's simply brave plus the suffix -ery.

The facts available don't trace a documented shift in meaning — the word arrived already tied to the act of 'braving' something, and English kept that sense intact.

It shares its root with the verb brave, meaning to face or endure something dangerous — the noun form just names the quality that verb describes.