imperialize

from The Collaborative International Dictionary of English v.0.48

Imperialize \Im*pe"ri*al*ize\, v. t. [imp. & p. p.
   {Imperialized}; p. pr. & vb. n. {Imperializing}.]
   To invest with imperial authority, character, or style; to
   bring to the form of an empire. --Fuller.
   [1913 Webster]