This is the 8419th most frequent Swedish word.
barnbarnet
Grandchild.
Here, 'barnbarn' (child form of 'barnbarnet') is used in the possessive context to indicate the grandchild to whom the speaker has a relationship.
Jag älskar att spendera tid med mitt barnbarn.
I love spending time with my grandchild.
The word 'barnbarnet' is utilized in this sentence as the topic or subject of the conversation occurring during the dinner.
De pratade om barnbarnet under familjemiddagen.
They talked about the grandchild during the family dinner.
In this sentence, 'barnbarnet' is used to refer to the individual grandchild as the subject performing the action of playing.