excommunicate
verb [ T ] uk/ˌek.skəˈmjuː.nɪ.keɪt/ us/ˌek.skəˈmjuː.nə.keɪt/
（尤指罗马天主教）开除…的教籍，把…逐出教会
When the Christian Church, especially the Roman Catholic Church, excommunicates someone, it refuses to give that person communion and does not allow them to be involved in the Church.