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Grandfather

/ˈɡrændˌfɑːðə/

A term of respect for one's father's or mother's father.

Synonyms:

My grandfather is a wise man.After the funeral, Nell's grandfather was taken back to the cottage.'Exactly what I told you, dear grandfather, indeed.'

Derived from Middle English grauntfadre, which originated from Old French grant, meaning great, combined with father.

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