κολαφίζω (< κόλαφος = Att.., κόνδυλοι, the knuckles, the closed fist) to strike with the fist, to buffet: Refs Mat.26:67, Mrk.14:65, 2Co.12:7; pass., Refs 1Co.4:11, 1Pe.2:20.† (AS)
Thayer:
1) to strike with the fist, give one a blow with the fist 2) to maltreat, treat with violence and contumely
κολαφίζω
kolaphizō
kol-af-id'-zo
From a derivative of the base of G2849; to rap with the fist