Nomen

das Zusammenleben

cohabitation, coexistence, living together

Die Regeln des Zusammenlebens müssen klar sein.

The rules of cohabitation must be clear.

Das Gelingen des friedlichen Zusammenlebens ist wichtig.

The success of peaceful coexistence is important.

the cohabitation/coexistence ((between / of)) the coexistence of different cultures

Koexistenz (coexistence), Gemeinschaft (community)

Composed of 'zusammen' (together) and 'Leben' (life).

Think of it literally as 'together-life'. It's the act of 'living together' turned into a noun.

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