persona non grata
noun /pɜːˌsəʊnə nɒn ˈɡrɑːtə/, /pɜːˌsəʊnə nəʊn ˈɡrɑːtə/
/pɜːrˌsəʊnə nɑːn ˈɡrɑːtə/
[uncountable] (from Latin)- a person who is not welcome in a particular place because of something they have said or done, especially one who is told to leave a country by the government
不受欢迎的人（尤指遭政府驱逐出境的） - Their ambassador was declared persona non grata and forced to leave the country.
他们的大使被宣布为不受欢迎的人，被迫离开这个国家。
词源Latin, from persona (Latin, literally ‘mask, character played by an actor’) + non ‘not’ + grata, feminine of gratus ‘pleasing’. - Their ambassador was declared persona non grata and forced to leave the country.