IPA: /ˌriːjuːnɪfɪˈkeɪʃən/
KK: /riːˌjuːnɪfɪˈkeɪʃən/
The process of bringing together things or people that were separated, especially in the context of a country that was divided.
The reunification of the two countries was celebrated by many citizens.
Reunification → It is formed from "re-" (meaning again) and "unificare" (from Latin, meaning to make one). The word "reunification" means to make something one again, typically referring to the process of bringing together parts that were previously separated.
Think of 'again' ('re-') and 'making one' ('unificare') to remember that reunification means bringing things back together as one.