婆 (pó) means 'grandmother' or 'elderly woman' and appears in many kinship compounds such as 外婆 (maternal grandmother) and 婆婆 (paternal grandmother or mother-in-law). On its own, it carries a general sense of an older female relative. It is rarely used independently and usually combines with another character.
婆婆对我特别好,像亲妈一样。
Pópo duì wǒ tèbié hǎo, xiàng qīn mā yīyàng.
My mother-in-law is so good to me — just like my own mother.
外婆年纪大了,走路比较慢。
wàipó niánjì dà le, zǒulù bǐjiào màn.
Grandma is getting old, so she walks rather slowly.
老婆婆坐在门口晒太阳。
lǎo pópó zuò zài ménkǒu shài tàiyáng.
The old lady sits at the doorway sunbathing.