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An antonym is a word with a meaning opposite to another word.

1 vote

What is a word to describe the opposite of "authentication"?

It doesn't really have one. As an adjective I might use "unauthenticated". e.g. "You are unauthenticated". But it doesn't exist as a verb. cf.: http://thesaurus.com/browse/authenticate
MartinSGill's user avatar