The British spelling of the present participle; the act of making something deliberately old-fashioned.
The present participle of 'archaise' (British spelling), formed by adding '-ing.' The American spelling is 'archaizing,' reflecting the different spelling conventions between British and American English.
The 's' versus 'z' difference between British 'archaising' and American 'archaizing' is actually part of a larger divide that started in the 1700s when Americans simplified spelling conventions!
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