It is the singular, informal form of the second-person pronoun, used when addressing one person in a casual or familiar setting.
Here are some examples:
* Nuvu emi chestunnavu? (What are you doing?)
* Nuvu enduku raavu? (Why didn't you come?)
* Nuvu naaku telusu. (I know you.)
It's important to note that there are different forms of "you" in Telugu depending on the context and level of formality:
* Meeru - Formal singular "you"
* Meeru - Formal plural "you"
* Nuvvu - Informal singular "you"
* Meeru - Informal plural "you"