The word "revive" means to bring something back to life, activity or use. It can refer to an action taken to restore something that has lost its vitality or ceased functioning properly. For example, if a person is unconscious and medical attention is given to them in order to bring them out of their unresponsive state, this could be described as reviving the person. Similarly, if a company's sales have been declining, reintroducing a popular product or service line may help "revive" the business. The word can also refer to an emotional or mental renewal - for example, someone who has lost hope may find something that inspires them and helps them feel more alive again, which could be described as reviving their spirits.