- unfriend (v.)
[unfriend 词源字典]
- in the Facebook sense, attested from November 2007, from un- (1) "not" + friend (v.). Unfriended is at least as old as Shakespeare in the sense "friendless." A noun unfriend "enemy" is recorded from late 13c., chiefly in Scottish, and was still in use in the 19th century.[unfriend etymology, unfriend origin, 英语词源]