Strong's G4867 — συναθροίζω (verb)
sunathroizo (soon-ath-royd'-zo) v.
1. to convene
[from G4862 and athroizo "to hoard"]
KJV: call (gather) together 
Root(s): G4862 
Compare: G4871 
Hebrew root: σύν
Occurrences: 3