Answer: ostracize

AnswerCrossword Clue
OSTRACIZEBlackball
OSTRACIZECast out
OSTRACIZEBanish from social favor.
OSTRACIZESend to Coventry.
OSTRACIZEExclude from society
OSTRACIZEBanish
OSTRACIZEFreeze out
ostracize(in ancient Greece) Banish (an unpopular or too powerful citizen) from a city for five or ten years by popular vote
ostracizeExclude (someone) from a society or group
ostracizeto exclude from a group by common consent