This is the 144th most frequent Slovenian word.
skupine
"Skupine" in English means "groups."
Here, 'skupini' is the plural form in the locative case, indicating placement in two groups.
Na izletu smo bili razdeljeni v dve skupini.
On the trip, we were divided into two groups.
Here, 'skupini' is in the locative case within a possessive context, referring to the members of our group.
V naši skupini je veliko nadarjenih pevcev.
In our group, there are many talented singers.
Here, 'skupine' is the nominative plural form, referring to the subject: groups of birds.