The Collaborative International Dictionary of English v.0.48:

Pommel \Pom"mel\, v. t. [imp. & p. p. Pommeledor Pommelled;
   p. pr. & vb. n. Pommeling or Pommelling.]
   To beat soundly, as with the pommel of a sword, or with
   something knoblike; hence, to beat with the fists. [Written
   also pummel.]
   [1913 Webster]