Antonyms for the phrase "joining together" include separation, division, disunity, discord, and fragmentation. These words refer to the opposite of bringing things together in harmony or unison. Separation implies a physical or emotional distance between individuals or objects, while division involves creating partitions or differentiating between parts. Disunity and discord suggest a lack of agreement, cooperation, or understanding, often resulting in conflict. Finally, fragmentation refers to breaking down a whole into smaller, disconnected pieces. Each of these antonyms present contrasting ideas to the concept of "joining together", emphasizing the importance of unity and solidarity in various contexts from personal relationships to global issues.