Mistik-ka wrote:From the Oxford English Reference Dictionary: "Yahweh … a form of the Hebrew name of God (YHVH) used in the Bible. The name came to be regarded by Jews ( c. 300 BC) as too sacred to be spoken, and the vowel sounds are uncertain."
Not so much 'unpronounceable' as 'ineffable' - i.e. forbidden from being uttered. All there in the Ten Commandments "Thou shalt not take the name of the Lord in vain". YHVH is written out in full in the Hebrew Bible, but traditionally without vowels. In versions where vowels have been inserted (to aid non-Hebrew speakers), the vowels belonging to a different word "Adonai", meaning "Lord", were inserted, as a reminder to the reader to utter this alternative word instead.
Hence the name "Jehovah" - much used by some religious sects - which is a misnomer arising from a literal reading of the mis-vowelled word (don't ask how the first 'a' becomes an 'e' - it's complicated...)