* Babcia: This is the most common and general term for grandmother. It's used in everyday conversation and is the most natural choice for most situations.
* Babunia: This is a slightly more affectionate and endearing term for grandmother. It's often used by children and grandchildren.
* Babcia ze strony matki: This means "grandmother on the mother's side" and is used to distinguish from the grandmother on the father's side.
* Babcia ze strony ojca: This means "grandmother on the father's side" and is used to distinguish from the grandmother on the mother's side.
You can also use "prababcia" which translates to "great-grandmother" and "prababunia" for "great-grandmother (affectionate)".
The choice of word ultimately depends on the specific context and the desired level of formality.