Reclusivenesses, meaning the tendency to be reclusive or withdrawn, does not have an antonym as such. However, there are words that describe the opposite characteristic, which includes being outgoing, sociable and extroverted. Such related words include conviviality, gregariousness, sociability, and affability. These refer to a trait of being friendly, outgoing, and easy to talk to. Essentially, they describe an inclination towards being connected with others, seeking social interaction and enjoying group settings. While reclusivenesses may indicate a desire for solitude, isolation and introspection, the antonyms of this word embody a need for connection, communication, and community.