What is the greek word for sport?

There isn't one single perfect Greek word for "sport" as the concept of modern sport is a relatively recent development. However, depending on the nuance you want to convey, several words could be used:

* Άθλημα (Athlima): This is probably the closest single word translation. It refers to an athletic contest or competition, and is often used to translate "sport" in modern Greek.

* Αθλητισμός (Athlitismos): This word means "athletics" or "sporting activity" more broadly, encompassing the practice and culture of sports.

* Words relating to specific athletic activities could be used depending on the context. For example, if referring to a particular sport like running, you would use δρομιά (dromia) related to running, and so on.

Therefore, άθλημα (Athlima) is the most commonly used and closest single word equivalent, but the best choice depends on the context.