The Collaborative International Dictionary of English v.0.48:

Nectarize \Nec"tar*ize\, v. t. [imp. & p. p. Nectarized; p.
   pr. & vb. n. Nectarizing.]
   To mingle or infuse with nectar; to sweeten. [Obs.]
   --Cockeram.
   [1913 Webster]