What is the greek word for prosper?

There isn't one single perfect Greek word for "prosper," as the best translation depends on the nuance you want to convey. However, here are a few options with slightly different meanings:

* εὐδαίμων (eudaimon): This is probably the closest single word. It implies a state of flourishing, well-being, and good fortune, encompassing both material prosperity and happiness.

* εὐτυχής (eutychēs): This means "lucky" or "fortunate," suggesting prosperity that comes from good luck.

* θησαυρίζω (thēsaurizō): This means "to treasure" or "to hoard," implying accumulating wealth. It doesn't encompass the full meaning of prosperity, but relates to a key component.

* πλουτίζω (ploutizō): This means "to enrich" or "to become wealthy," focusing on the material aspect of prosperity.

The best choice will depend on the context. For general prosperity encompassing happiness and well-being, εὐδαίμων (eudaimon) is likely the most suitable.