This is the 339th most frequent Slovenian word.
dolarjev
The Slovenian word "dolarjev" means "dollars" in English (genitive plural form).
Here, 'dolarjev' is used in the genitive plural form to denote an amount of money that is being referred to or borrowed.
Sem si sposodil pet dolarjev od prijatelja.
I borrowed five dollars from a friend.
In this case, 'dolarjev' also represents an amount in the genitive plural, indicating that this is the currency Filip exchanged.
Filip je zamenjal sto dolarjev v banki.
Filip exchanged one hundred dollars at the bank.
Here, 'dolarjev' is again in the genitive plural form, showing the amount of money paid for something.