G656 — aposunagogos
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
aposunagogos — pronounced ap-os-oon-ag'-o-gos
from 575 and 4864; excommunicated:--(put) out of the synagogue(-s). see GREEK for 575 see GREEK for 4864
3 occurrences in the KJV.
John 9:22
These words spake his parents, because they feared the Jews: for the Jews had agreed already, that if any man did confess that he was Christ, he should be put out of the synagogue.
John 12:42
Nevertheless among the chief rulers also many believed on him; but because of the Pharisees they did not confess him, lest they should be put out of the synagogue:
John 16:2
They shall put you out of the synagogues: yea, the time cometh, that whosoever killeth you will think that he doeth God service.