fraternisation

/frəˌtɜːrnɪˈzeɪʃən/
noun
  1. Friendly or brotherly interaction between people, especially when it is not officially allowed or expected.
    • Fraternisation between managers and staff is discouraged in some companies.
    • The two rival groups engaged in fraternisation during the festival, breaking down old barriers.
    • The soldiers were warned against fraternisation with the local people.
Antonyms