Sentence:  ... and I smashed my hand down on the gun to my left and it roared and I felt for the man's throat and made the kill as the other man brought his gun up and fired wild and I went in very close and used a <WSD>heel-palm</WSD> and drove the nose bone upward into the brain as Ibrahimi screamed something and I saw the flash of a blade and blocked it.... 
Meaning of the word marked with <WSD> tags:  A blow in which the heel of the palm strikes an opponent.