This is the 314th most frequent Croatian word.
ostalih
"Of the others" or "remaining."
In this sentence, 'ostalih' refers to the 'remaining five' out of a larger group, used as a possessive form.
Podijeli kolače sa svima osim s ostalih pet.
Share the cakes with everyone except the remaining five.
'Ostalih' in this sentence describes the other team members who were not initially mentioned but are included in the context.
Dodaju se mišljenja ostalih članova tima.
The opinions of the remaining team members are added.
Here, 'ostalih' indicates a subset of previously mentioned attendees who are being specifically referred to.