Questions & Answers about Ugovor o najmu još vrijedi.
Both patterns can exist in Croatian, but ugovor o najmu is a very common and natural way to say contract about renting / lease agreement.
- ugovor = contract, agreement
- o = about, concerning
- najmu = najam in the case required after o
So ugovor o najmu literally means contract about lease/rental.
You may also see related expressions in Croatian legal or formal language, but ugovor o najmu is a standard, idiomatic phrase.
Because the preposition o requires the locative case.
- dictionary form: najam
- after o: o najmu
This is a normal case change in Croatian:
- govoriti o poslu = to talk about work
- čitati o gradu = to read about the city
- ugovor o najmu = lease contract
So najmu is not a different word; it is just the locative form of najam.