This is the 735th most frequent Indonesian word.
rupiah
The official currency of Indonesia.
Here, 'rupiah' is used as the currency of Indonesia, representing the monetary unit that the speaker exchanged their money into.
Saya menukar lima puluh dolar ke dalam rupiah di bandara.
I exchanged fifty dollars into rupiah at the airport.
In this sentence, 'rupiah' specifies the unit of money referencing a price.
Barang itu harganya seratus ribu rupiah.
That item's price is one hundred thousand rupiah.
The term 'rupiah' here indicates the currency type in which the salary is saved.