The woman said to him, "Sir, you have nothing to draw with, and the well is deep. From where then have you that living water?
The word Christ is a Greek word. It is the translation into Greek of the Hebrew word Messiah. And so, you have the Greek word Christ, but it is a word that is the translation of the word Messiah. So John points that out here. "I know that when the Messiah comes," which in Greek is called Christ, Christos.