What is greek translation of word god?

There isn't one single Greek word that perfectly translates the English word "God." The best translation depends heavily on the context and the specific attributes of the deity being referred to. Here are some possibilities:

* θεός (theós): This is the most common and general word for "god" in Greek. It refers to a deity, but it could be any god within a pantheon. It's often used in the plural, θεοί (theoi), meaning "gods."

* κύριος (kýrios): This word means "lord" or "master," and in the Septuagint (the Greek translation of the Hebrew Bible), it's frequently used to translate the Hebrew word for God, Yahweh. It emphasizes God's sovereignty and authority.

* ὁ Θεός (ho Theós): This is a definite article ("the") plus "theós," often used to refer to the one God in Christianity. It emphasizes the uniqueness of God.

Therefore, the best translation depends on the context. For a general "god," θεός (theós) is appropriate. For the singular God of Christianity or Judaism, ὁ Θεός (ho Theós) or κύριος (kýrios) are more fitting, depending on the nuance intended.