The Collaborative International Dictionary of English v.0.48:

Archaize \Ar"cha*ize\, v. t. [imp. & p. p. Archaized; p. pr. &
   vb. n. Archaizing.] [Gr. 'archai:`zein.]
   To make appear archaic or antique. --Mahaffy.
   [1913 Webster]

WordNet (r) 3.0 (2006):

archaize
    v 1: give an archaic appearance of character to; "archaized
         craftwork" [syn: archaize, archaise]