Overconfiding means the inclination to share overly personal or confidential information without considering the consequences. Some synonyms for this word include indiscreet, imprudent, rash, and incautious. These words indicate a lack of discretion or judgment when it comes to sharing information. Other synonyms for overconfiding include reckless, heedless, and careless, emphasizing the risk of sharing sensitive information. It is important to remember to use discretion and make careful decisions when sharing personal information. Before confiding in someone, consider whether they can be trusted to keep the information confidential and weigh the potential risks and benefits of sharing such information.