Correct spelling, explanation: the word granddaughter has a very long history as its origin can be found in the Germanic languages. The word could already be found in Old English, in which it had the form dohtor. Granddaughter entered English directly from a Dutch form dochter. Today, granddaughter is one of the most basic words used to describe family relationships.

Definition of granddaughter:
1. noun – it’s the daughter of your son or daughter;
My granddaughter is such a lovely girl, but she visits me too rarely.

Granddaughter word granddaughter:
A few other words which belong to the same word family are: granddad, grandson, and grandchildren.
He is a young granddad, who loves spending his time with his granddaughter.
Both his grandson and granddaughter take care of him a few times a week.
He loves both of his grandchildren, but his granddaughter really takes after him in so many aspects.

Incorrect spelling, explanation: granddaughter joins the prefix grand with the word daughter and therefore the correct spelling is granddaughter. However, because of the pronunciation, many English users think that there is only one -d letter in the word, and they spell granddaughter as grandaughter, which is wrong.

Incorrect spelling

Incorrect spelling