ostracize:
- to banish or expel from a community or group; to cast out from social, political, or private favor
- [Greek Antiquity] to exile by ostracism; to banish by a popular vote, as at Athens
(Example: As for scientists who might be tempted to pursue the theory, he says, they worry that their colleagues might ostracize them for stepping out of line and that their funding could suffer. [Reference: Jon Cohen, "The Hunt for the Origin of AIDS", The Atlantic, October 2000])
