Grandmother

外婆

ngoi⁶ po⁴

(mother of someone's parent)

外祖母

ngoi⁶ zou² mou⁵

(mother of someone's parent)

婆婆

maternal

(mother of someone's parent)

嫲嫲

maa⁴ maa⁴

(mother of someone's parent)

祖母

zou² mou⁵

(mother of someone's parent)