After one too many rants on your Facebook feed, you may decide to unfriend your annoying aunt Helen once and for all. Unfriend, which means "to remove (someone) from a list of friends or contacts on a social networking website," has become a commonly used verb in our vocabulary. But where did the term come from?
According to Interesting Literature, the Middle English poem "Brut" by Layamon is the first known usage of both "muggle" and a form of "unfriend": "We sollen ... slean houre onfrendes and King Learwenden after Brenne." Here, the noun form of unfriend (though spelled slightly differently) delineates someone who is not a friend, but not necessarily an enemy either. It wasn't until the 17th century that "unfriend" was first used as a verb. Mark Zuckerberg can thank the late, great William Shakespeare.