Shalom is the Hebrew word for peace. Shalom is used as a greeting like "hello" in English. "Shalom shalom" is often used like "bye bye" is used in English.The repetition of a word is used for...
The following answers and opinions refer to the tetragrammaton, or four letter name, which is not actually pronounced Yahweh or Jehovah.
The holiest name the Jews ever had for G-d was never spoken...