Unmember

Unmember: verb. An archaic version of the word "to forget". The word was last used by Chaucer and even in his time it was rarely used in writing and practically never used in spoken word. There are various theories about when the word was first used, but the most prominent and accepted one is that it was first used the year before Bede was born and it was actually an used in association with an accident by Bede's mother.