Learn Croatian: Zanima me koja je tvoja nova adresa. - I wonder what your new address is.

In Croatian, when you ask 'what' about a specific noun (like an address, name, or phone number), you usually use the word for 'which' (koji, koja, or koje). Because adresa is a feminine noun, we use the feminine form koja. You can think of it as asking 'Which is your new address?'

How does Zanima me mean 'I wonder'?

Zanima comes from the verb zanimati (to interest), and me is 'me'. Literally, Zanima me means 'It interests me.' This is the standard and most natural way to express 'I wonder' or 'I am curious about' in Croatian.

Do I need a word like da to connect the two halves of the sentence?

No, you do not need da here. When an indirect question starts with a question word (like koja, tko, gdje, or kada), that word itself acts as the bridge connecting the two halves of the sentence. You only need a special connector like da li if the indirect question is a yes/no question.

Why does the verb je come right after koja instead of at the end of the sentence?