The antonyms for the word "un-connectedness" are relatedness, connection, association, and attachment. Relatedness implies a sense of belongingness, a connection between things or individuals. Connection denotes a link between two or more things, whether physical or abstract. Association refers to a group or organization's ability to collaborate and work together, whereas attachment implies a feeling of loyalty and devotion towards someone or something. These antonyms denote a feeling of interconnectedness, belongingness and coherence, opposed to the idea of being isolated, disconnected or aloof. Having a sense of connection with others is an essential part of human life, allowing for empathy, socialization and mutual support.