grandparent

n. parent of one's father or mother

Grandparents are  family members, the father or mother of a person's own father or mother, being respectively grandfather and grandmother. Grandparents form an important element of the extended family.In traditional cultures, grandparents often had a direct and clear role in relation to the care and nurture of children. This has tended to be lost with the development of the nuclear family. In cases where the parents are not willing or able to provide adequate care for their children, grandparents may take on the role of primary caregivers.
See more at Wikipedia.org...

Noun
1. a parent of your father or mother
(hypernym) forebear, forbear
(hyponym) grandfather, gramps, granddad, grandad, granddaddy, grandpa

NONNO. NONNA

Blackfoot: aaáhs
English: grandparent