Antonyms are words that have opposite meanings to a particular word. In the case of the word "re-joining," which means to come back together after being separated, some antonyms might include words like separating, disconnecting, detaching, departing, or isolating. These words describe actions that result in distance or disunity between people or things, rather than bringing them closer together. Other antonyms might include unjoining, uncoupling, undoing, or disassembling, all of which suggest a deliberate effort to break or dismantle something that was previously joined or connected. By understanding antonyms for a word like "re-joining," we can better appreciate the nuances of language and use it more effectively in our communications.