Strong's G1264 · Greek

διαμάχομαι

diamachomai · dee-am-akh'-om-ahee

from 1223 and 3164; to fight fiercely (in altercation)

Scholarly Lexicons

Abbott-Smith Manual Greek Lexicon

 1 δια-μάχομαι [in LXX for לחם ni., Da LXX 10:20 ; Si 8:1 , 3 38:28 51:19 * ;] to struggle against . In argument, to contend : Ac 23:9 .† 

G. Abbott-Smith, A Manual Greek Lexicon of the New Testament (1922) — public domain