UNFRIEND
Etymology
Noun
unfriend (plural unfriends)
One who is not a friend; an enemy.
Synonyms
• backfriend
Verb
unfriend (third-person singular simple present unfriends, present participle unfriending, simple past and past participle unfriended)
(rare) To sever as friends.
(Internet) To defriend; to remove from one's friends list (e.g. on a social networking website).
Synonyms
• defriend
Antonyms
• friend
• befriend
Anagrams
• reinfund
Source: Wiktionary
Un*friend", n.
Definition: One not a friend; an enemy. [R.] Carlyle.
Source: Webster’s Unabridged Dictionary 1913 Edition