The
Tetragrammaton, literally means
the four letter word. The word in question is the
Hebrew word spelled using the
Hebrew alphabet : yodh heh waw heh. This is the ineffable name of
God in Hebrew, and is so holy that observant
Jewish people read it as
"hashem" which means "the name". A reading from the
Tanakh when
Moses was faced with the burning bush on [Mount Sinai]
?, translates the Tetragrammaton as
I am that I am. Because of the strictures in Judaism, the pronunciation is controversial. See
Yahweh and
The name of God in Judaism.