The term "un-social" refers to a person who lacks sociability or is not friendly with others. A suitable antonym for "un-social" can be "sociable," which denotes a person who is friendly, outgoing, and enjoys interacting with people. Another suitable antonym for "un-social" is "gregarious," meaning a person who is sociable and enjoys being around people, participating in group activities, and making new friends. Even if a person is not necessarily outgoing, he or she can be described as "amicable," meaning friendly and approachable. The antonyms of "un-social" highlight the positive qualities of a person who is friendly, outgoing, and approachable.