Strong's G4871 — συναλίζω (verb)
sunalizo (soon-al-id'-zo) v.
1. to throng together, i.e. huddle together
[from G4862 and halizo "to throng"]
KJV: assemble together 
Root(s): G4862 
Compare: G4867 
Hebrew root: σύν
Occurrences: 1