Audacity is a noun that means:

a. bold courage; daring.

b. shameless or brazen boldness; insolence.

Example sentences:

1. You have the audacity to ask that question here?
2. My boss had the audacity to scold me in front of my coworkers.
3. She had the audacity to promote her book during the interview.
4. The man had the audacity to bungee jump off the building.
5. He has a lot of audacity to defy his boss.
6. Some of the students had the audacity to play in the library instead of studying.
7. He had the audacity to get on stage and sing in front of the crowd.
8. To steal the painting was one thing put to replace it with his own photograph took audacity.