Strong's #2852: kolaphizo (pronounced kol-af-id'-zo)
 from a derivative of the base of 2849; to rap with the fist:--buffet.
Thayer's Greek Lexicon:
 ́ 
 
  kolaphizō 
 
 1) to strike with the fist, give one a blow with the fist
 2) to maltreat, treat with violence and contumely
 
  Part of Speech: verb
Relation: from a derivative of the base of G2849
  Citing in TDNT: 3:818, 451
 
Usage:
This word is used 5 times:
Matthew 26:67: "his face, and  buffeted him; and others smote him with the palms of their hands,"
Mark 14:65: "his face, and  to buffet him, and to say unto him,"
1 Corinthians 4:11: "and are naked, and  are buffeted, and have no certain dwelling place;"
2 Corinthians 12:7: "the messenger of Satan to  buffet me, lest I should be exalted above measure."
1 Peter 2:20: "what glory is it, if,  when ye be buffeted for your faults, ye shall take it patiently? but"