Etymograph

English

letterbook

From letter + book.

A compound of letter + book

Latin littera ‘letter of the alphabet; (plural) epistle’

Old French letre

Middle English letter

English letter

Proto-Germanic *bōks ‘letter’

Proto-West Germanic *bōk ‘inscribed billet, letter’

Old English bōc

Middle English bok ‘a document’

English book

Today it means

noun A book in which letters (written correspondence) or copies of letters are kept.

Language periods are conventional ranges, not dates for this word.

Etymograph / letterbook