Regrouped is a verb that means to reorganize or reassemble. Its antonyms are words that express the opposite of this process, such as scatter, disperse, disband, dismantle, and dissolve. Scatter refers to the act of spreading or separating widely from a central point. Disperse means to scatter or spread widely over a wide area. Disband refers to the act of breaking up a group or organization. To dismantle is to take apart or demolish something. Finally, dissolve means to melt, disappear, or break down. All of these antonyms convey the idea of disunity or separation, while regrouped indicates a coming together for a common purpose.