The word "audacious" means being bold, brave, or daring. It describes someone who is willing to take risks or be unconventional in their actions or ideas. Full definition
I can be inarticulate about our most audacious goals because it seems unfair to even ask for what we really need to do. (quicksprout.com)
Instead of going for power, or looking to place it in the corner, he took the most audacious of penalties, a Panenka, in a final, under immense pressure! (anfieldindex.com)
Broadcom's bid for the larger company is Tan's most audacious move following a string of deals that have already made his company one of the world's largest suppliers of semiconductors. (fortune.com)