The antonyms of the word "re-grouped" can be words like dispersed, separated, disorganized, scattered, or uncoordinated. When a group is dispersed, it means that they moved away from each other and broke into smaller, disconnected groups. Meanwhile, when a group is separated, it means that they were once together, and they disengaged from each other, forming different or competing groups. Disorganized means that the group is no longer composed of people who work in an organized, structured, or coordinated manner. They could also be scattered or lacking in a particular location, making it difficult to coordinate and gather them effectively. Lastly, "uncoordinated" means that a particular group or individuals are not harmonized, meaning they have different objectives or end goals.