Strong's G652 — ἀπόστολος (noun)
apostolos (ap-os'-tol-os) n.
1. a delegate
2. (specially) an ambassador of the Gospel
3. (officially) a commissioner of Christ, "apostle" (with miraculous powers)
[from G649]
KJV: apostle, messenger, he that is sent 
Root(s): G649 
Hebrew root: ἀποστέλλω
Occurrences: 80