The grandmother
The Italian word 'La nonna' is used to refer to the mother of someone's parent, similar to how the English word 'The grandmother' is used. It is used in both formal and informal contexts, and is a common term in Italian family discussions.
The grandmother is cooking dinner.
This is a sentence where 'La nonna' or 'The grandmother' is the subject doing the action, which in this case is cooking dinner.
Maria's grandmother lives in the countryside.
In this sentence, 'La nonna' is used to show a family relation to a character named Maria. The possessive 'di Maria' translates to 'of Maria', which is commonly used in English as 'Maria's'.
I visit my grandmother every Sunday.
This phrase uses 'la nonna' to convey a habitual action by an unstated subject. The subject, implied to be 'I', visits 'the grandmother' every Sunday. The 'my' in the English translation is implied in the Italian text.