keep down

1. to prevent from growing 2. to be able to digest food instead of vomiting while you're ill. 3. not to make noise 4. to prevent people from being successful

Examples

1. Helen needs to keep her weight down. 2. After food poisoning I wasn't able to keep anything down for a week. 3. Can you keep the music down, please? 4. A lot of talented people were kept down that time.