Strong's G1264 — διαμάχομαι (verb)
diamachomai (dee-am-akh'-om-ai) v.
1. to fight fiercely (in altercation)
[from G1223 and G3164]
KJV: strive 
Root(s): G1223, G3164 
Hebrew root: μάχομαι
Occurrences: 1