Yourgrandchildis the child of your child. A male grandchild is called agrandsonand a female grandchild is called agranddaughter.
Now I see my grandchildren every week.
She has a 10 -year-old grandson.
His life is transformed by the arrival of his orphaned granddaughter.
To refer to the children of your grandchildren, the prefixgreat-is used. For each extra generation, anothergreat-is added.
I have six grandchildren and ten great-grandchildren.
He was the great-grandson of Charles Darwin.
The letter was inherited by White's great-great-granddaughter.