grand mother به انگلیسی
From Longman Dictionary
grand‧moth‧er /ˈɡrænˌmʌðə $ -ər/ ●●● S2 W2 noun [countable]
the mother of your mother or father
مادر مادر یا پدر شما
Example
Then she explained that she lived at the villa and that Leonie was her grandmother, and Lais and Leonore her half-sisters
His father died a few months after his birth and his grandmother then ruled as regent
I looked just like the young girl my grandmother had shown me in her photograph albums
The materials available to our grandmothers were either more toxic or less effective
Your grandmother believed we had indeed lost our souls