The Collaborative International Dictionary of English v.0.48:

Cordialize \Cor"dial*ize\ (k[^o]r"jal*[imac]z or
   k[^o]rd"yal*[imac]z; 106), v. t.
   1. To make into a cordial.
      [1913 Webster]

   2. To render cordial; to reconcile.
      [1913 Webster]

The Collaborative International Dictionary of English v.0.48:

Cordialize \Cor"dial*ize\, v. i.
   To grow cordial; to feel or express cordiality. [R.]
   [1913 Webster]