re ‧ group /ˌriːˈɡruːp/ BrE AmE verb
1 . [intransitive and transitive] to form a group again in order to be more effective, or to make people do this:
The Allies regrouped and launched a new attack.
The Russians retreated, needing to regroup their forces.
2 . [intransitive] American English to stop and think about something, so that you can start to do something again in a better way:
I paused for a minute to regroup.