Strong’s Greek
G4867 — sunathroizo
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
συναθροίζω ἀθροίζω
sunathroizo — pronounced soon-ath-royd'-zo
from 4862 and athroizo (to hoard); to convene:--call (gather) together. see GREEK for 4862
3 occurrences in the KJV.
Luke 24:33
And they rose up the same hour, and returned to Jerusalem, and found the eleven gathered together, and them that were with them,
Acts 12:12
And when he had considered the thing, he came to the house of Mary the mother of John, whose surname was Mark; where many were gathered together praying.
Acts 19:25
Whom he called together with the workmen of like occupation, and said, Sirs, ye know that by this craft we have our wealth.