The New Oxford American Dictionary has announced its 2009 word of the year. It is “unfriend”, as in “I decided to unfriend my roommate on Facebook after we had a fight”.
Unfriend has “currency and potential longevity”, says Christine Lindberg, senior lexicographer for Oxford's US dictionary programme. It is true, she says, that most words with the prefix “un-” are adjectives (unacceptable, unpleasant) but there are some “un-” verbs, such as unpack and uncap. “Unfriend has real lex-appeal,” she says.
“Unfriend” will irritate those who oppose the nasty habit of turning nouns into verbs. But nouns have been turning into verbs for ages. In his book The Language Instinct, Steven Pinker estimates that a fifth of English verbs started as nouns, including “to progress”, “to contact” and “to host”.