The Collaborative International Dictionary of English v.0.48:

Mangonize \Man"go*nize\, v. t. [L. mangonizare, fr. mango a
   dealer in slaves or wares, to which he tries to give an
   appearance of greater value by decking them out or furbishing
   them up.]
   To furbish up for sale; to set off to advantage. [Obs. or R.]
   --B. Jonson.
   [1913 Webster] Mangostan
   Mangosteen