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The Collaborative International Dictionary
Uncentury

Uncentury \Un*cen"tu*ry\, v. t. [1st pref. un- + century.] To remove from its actual century. [R.]

It has first to uncentury itself.
--H. Drummond.

Wiktionary
uncentury

vb. (context rare transitive English) To remove from its actual century.