How do you say Grimoires?

What does the word Grimoire mean?

: a magician’s manual for invoking demons and the spirits of the dead.

What language is the word grimoire?

It is most commonly believed that the term grimoire originated from the Old French word grammaire, which had initially been used to refer to all books written in Latin. By the 18th century, the term had gained its now common usage in France, and had begun to be used to refer purely to books of magic.

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