archaize

from The American Heritage® Dictionary of the English Language, 5th Edition.

• intransitive verb To give an archaic quality or character to; make archaic.
• intransitive verb To use archaisms, as in prose, to suggest the past.

from The Century Dictionary.

• To use or imitate what is archaic; imitate an olden style; especially, to make use of archaisms in speech.

from the GNU version of the Collaborative International Dictionary of English.

• transitive verb To make appear archaic or antique.

from Wiktionary, Creative Commons Attribution/Share-Alike License.

• verb To give an archaic quality or character to; make archaic, to suggest the past.

from WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.

• verb give an archaic appearance of character to