How do you say i have nothing in greek?

The most straightforward way to say "I have nothing" in Greek is:

Δεν έχω τίποτα (Den echo tipota)

* Δεν (Den): Not

* έχω (echo): I have

* τίποτα (tipota): nothing

You could also use καμιά (kamia) instead of τίποτα (tipota) for "nothing" resulting in: Δεν έχω καμιά (Den echo kamia), but τίποτα (tipota) is more common.