The term "antiegoist" refers to someone who is against selfishness and self-centered behavior. There are several synonyms that can be used to describe such a person. The first is altruistic, which means that the person is focused on the well-being of others. Another synonym is empathetic, which means that the person is able to understand and share the feelings of others. A third synonym is compassionate, which means that the person is willing to help and support others. Other synonyms for antiegoist include selfless, generous, caring, and humanitarian. Ultimately, anyone who goes out of their way to help others and put their needs before their own can be considered an antiegoist.