ostracize

To ban a person from a city for five or ten years through the procedure of ostracism.

Republics have been accused of being ungrateful. Aristides was ostracised for being called the Just, and Themistocles banished, after saving his country from desolation.

[T]he person who was ostracised was obliged to leave Athens within ten days after the sentence, and unless a vote of the people recalled him before the expiration of that time, to stay in exile for ten years.

To exclude a person from a community or from society by not communicating with them or by refusing to acknowledge their presence; to refuse to associate with or talk to; to shun.

You then moſt Noble Equivocations and Alluſions, whom Rhetorick would Oſtraciſe, ſeek Revenge for your Baniſhment; [...]

The inflexible advocate[s] of the people's rights, were either expelled the Senate Chamber, ostracised, or immolated on the reeking altars of patriotism, by the encrimsoned sword of slaughtering persecution.