This is the 47th most frequent Croatian word.
i
"And."
The word 'i' connects 'friends' and 'family,' showing inclusion and association.
Na rođendanu su bili moji prijatelji i obitelj.
At the birthday, my friends and family were present.
Here, 'i' means 'and,' used to connect two similar parts of a sentence.
Imam kuću i automobil.
I have a house and a car.
In this context, 'i' also means 'and,' listing two subjects the speaker studies.