In Chinese culture, there are different terms used to refer to grandparents depending on the side of the family and the specific relationship. Here are some of the most common terms used for grandmothers:

- Paternal grandmother: 奶奶 (nǎinai) or 外婆 (wàipó) The term 奶奶 (nǎinai) is used to refer to the paternal grandmother, while 外婆 (wàipó) is used for the maternal grandmother. The term 奶 (nǎi) means “milk”, and the repetition of the character emphasizes the close relationship between the grandmother and the grandchild. The term 外 (wài) means “outside”, which signifies that the maternal grandmother is from outside the family’s household.
- Maternal grandmother: 姥姥 (lǎolao) or 外婆 (wàipó) The term 姥姥 (lǎolao) is used to refer to the maternal grandmother. The term 姥 (lǎo) means “old”, which signifies respect and admiration for the grandmother’s age and wisdom.
- Great grandmother: 曾祖母 (zēngzǔmǔ) or 外曾祖母 (wàizēngzǔmǔ) The term 曾祖母 (zēngzǔmǔ) is used to refer to the great grandmother on the paternal side, while 外曾祖母 (wàizēngzǔmǔ) is used for the great grandmother on the maternal side.
- Informal terms: 阿婆 (āpó), 婆婆 (pópo), or 奶奶 (nǎinai) In addition to the formal terms mentioned above, there are also informal terms that can be used to refer to grandmothers. 阿婆 (āpó) is a colloquial term that can be used to refer to either grandmother, while 婆婆 (pópo) can be used to refer to the grandmother on the husband’s side. The term 奶奶 (nǎinai) can also be used as an informal term of endearment for either grandmother.
It is important to note that the specific terms used to refer to grandparents can vary depending on the dialect and region of China. For example, in some parts of Southern China, the term 婆婆 (pópo) may be used to refer to the maternal grandmother instead of the paternal grandmother.
In conclusion, the Chinese language has several different terms used to refer to grandmothers, with specific terms used for the paternal and maternal grandmothers, as well as great grandmothers. Informal terms of endearment are also used to refer to grandmothers. These terms can vary depending on the dialect and region of China.