Strong's G4170 — πολεμέω (verb)
polemeo (pol-em-eh'-o) v.
1. to be (engaged) in warfare, i.e. to battle
{literally or figuratively}
[from G4171]
KJV: fight, (make) war 
Root(s): G4171 
Hebrew root: πόλεμος
Occurrences: 7