* Φιλοτιμία (philotímia): This word is often translated as "honor," "pride," or "sense of duty," but it also encompasses a strong sense of generosity and self-sacrifice, especially in the context of community and upholding one's reputation. It's perhaps the closest single word, but it has a broader meaning.
* Αφειδία (apheidia): This word means "unsparingness," "liberality," or "profusion." It emphasizes the aspect of giving without reservation.
* Επιείκεια (epeikeia): This translates to "leniency," "clemency," or "forbearance." While not directly "generosity," it suggests a generous spirit in dealing with others, showing understanding and compassion.
* δωρεά (doréa): This word means "gift," but it can also imply the generous act of giving.
The best word to use would depend on the context. For general generosity, φιλοτιμία (philotímia) is probably the closest single word, although it's important to understand its wider connotations.