The antonym for the phrase "secludes oneself" would be "socializes." When someone secludes themselves, they isolate themselves from others and choose to be alone. On the other hand, when someone socializes, they interact with people and engage in activities that involve other individuals. Socializing can mean anything from attending parties or events to spending time with family and friends, to collaborating with colleagues at work. Socializing helps individuals alleviate stress, improve their mental wellbeing, and fosters a sense of community. By socializing, people can build strong relationships and develop a network of people who provide support and companionship.