Strong’s Greek
G4871 — sunalizo
The entry below is Strong’s own definition (1890, public domain), and every verse where the word occurs.
συναλίζομαι
sunalizo — pronounced soon-al-id'-zo
from 4862 and halizo (to throng); to accumulate, i.e. convene:--assemble together. see GREEK for 4862
1 occurrence in the KJV.
Acts 1:4
And, being assembled together with them, commanded them that they should not depart from Jerusalem, but wait for the promise of the Father, which, saith he, ye have heard of me.