The word "audacious" means bold, daring, or fearless.
It can also mean showing a willingness to take risks or act with confidence.
Examples:
- "The firefighter made an audacious rescue."
- "She made an audacious decision to start a business at 18."
Other options:
- "Afraid," "cowardly," and "fearful" all indicate lack of courage, and are opposites of "audacious."
Hence, the word closest in meaning is "bold."