Akademik

1. a diplomat who is unacceptable to the government to which he is sent

2. a person who for some reason is not wanted or welcome

↑unpleasant person, ↑disagreeable person, ↑ingrate, ↑thankless wretch, ↑ungrateful person, ↑intruder, ↑interloper, ↑trespasser, ↑meddler, ↑disreputable person, ↑sourpuss, ↑picklepuss, ↑gloomy Gus, ↑pouter, ↑spoilsport, ↑killjoy, ↑wet blanket, ↑party pooper, ↑tease, ↑teaser, ↑annoyer, ↑vexer, ↑troublemaker, ↑trouble maker, ↑troubler, ↑mischief-maker, ↑bad hat, ↑undesirable, ↑villain, ↑scoundrel

persona non grata [pɜːˌsəʊnə nɒn ˈɡrɑːtə] [pɜːrˌsoʊnə nɑːn ˈɡrɑːtə] [pɜːˌsəʊnə nəʊn ˈɡrɑːtə] noun uncountable (from Latin)

a person who is not welcome in a particular place because of sth they have said or done, especially one who is told to leave a country by the government

•

Their ambassador was declared persona non grata and forced to leave the country.

[persona non grata] Latin, from persona (Latin, literally mask, character played by an actor) + non ‘not’ + grata, feminine of gratus ‘pleasing’.