Broody means that a hen tries to hatch an egg, even if they aren't fertilized. She becomes defensive, and very set in her 'Mommy Duties' she won't eat, drink, or poop until the eggs have hatched. If she is broody, you will need to break her of the broody behavior if the eggs aren't fertilized. There are many ways to do this.
1) You can place ice or a cold pack underneath her.
2) You can separate her from the nesting box, and not allow her access. (Always do this)
3) You can try dipping her lower end into cool water a few times a day.
Here is a website that explains more.
https://www.thehappychickencoop.com/6-ways-to-break-a-broody-hen/
Good luck and best wishes!