What is the greek word for defend?

There isn't one single perfect Greek word for "defend," as the best translation depends on the context. However, some possibilities include:

* ἀμύνω (amýnō): This verb implies warding off, protecting, or defending against attack. It's a good general-purpose word.

* προστάττω (prostattó): This means "to command," "to protect," or "to defend," often implying a position of authority in the defense.

* ὑπερασπίζω (hyperaspízō): This literally means "to defend with a shield," and carries a more literal and physical connotation of defense.

* ἀπολογέομαι (apologéomai): This means "to make a defense," "to plead one's case," or "to apologize." This is appropriate when defending oneself in a legal or rhetorical context.

The best choice will depend heavily on the specific situation being described.