The phrase "keep at bay" means to keep something or someone away or under control. Some common synonyms for this phrase include restrain, control, hinder, impede, stave off, ward off, and repel. For example, if someone is trying to start an argument, it's important to restrain and control your emotions to keep them at bay. Similarly, wearing bug spray can help hinder and repel mosquitoes, keeping them at bay. Staving off procrastination by setting daily goals is another way to keep it at bay. Overall, there are a variety of words and phrases that can be used interchangeably with "keep at bay", offering a range of options for expressing this similar concept.