IPA: /ˈɡræn(d)ˌdɔːtə/
KK: /ˈɡrændˌdɔːtər/
A girl or woman who is the child of one's son or daughter.
My granddaughter loves to play in the park.
Granddaughter → It is formed from "grand" (from Old French *grand*, meaning large or great) and "daughter" (from Old English *dohtor*, meaning female child). The word "granddaughter" refers to the daughter of one's child, emphasizing the generational relationship as a 'great' or 'large' extension of the family.
Think of 'grand' meaning 'great' and 'daughter' meaning 'female child' — a granddaughter is a great extension of the family through one's child.