Shakespeare was known for inventing words, and he was also the first to use "unfriend" as a verb. The way he used it was slightly different—a passive losing of friends, rather than the active ending of a friendship—such as in this line from "Twelfth Night": "Being skilless in these parts; which to a stranger, / Unguided and unfriended, often prove / Rough and unhospitable." The verb most closely resembles our modern definition in a 17th century letter by Thomas Fuller, which states: "I Hope, Sir, that we are not mutually Un-friended by this Difference which hath happened betwixt us."
But once we got to the internet age, the credit went to Facebook, right? Not so fast. In fact, the first internet usage of the verb "unfriend" was in 2003 from a Usenet user named "Woo-hoo." Learn some more words that are older than they seem in the videos below.