Learn Turkish: Neyi merak ediyorsun? - What are you curious about?

Neyi is the specific object form of ne (what). In English, we say 'What are you curious about?', but in Turkish, the verb merak etmek (to be curious / to wonder) takes a direct object. When we ask 'what' as the specific target of your curiosity, we must use neyi.

Where is the word for 'about' in this sentence?

There isn't one! In English, we are curious 'about' something. In Turkish, you directly act on the thing you are wondering about. Because the 'what' is the direct object of the verb, we just use the specific question word neyi without any extra words for 'about'.

How does the word ediyorsun work here?

It comes from the helper verb etmek (to do / to make). Merak etmek is a two-word compound verb meaning 'to be curious' or 'to wonder'. In ediyorsun, the t in etmek changes to a d because it is followed by a vowel in the -iyor (present continuous) ending. The -sun at the end means 'you'.

If I wanted to ask 'Who are you curious about?', would I use kimi?