“… As mentioned earlier, almost all the root mantra in the Mystical Qabala involve the One Small Face Name.
The Name … is called the “Shem HaMeforesh” or “Brilliant Name of Fire.” It is often simply referred to as “HaShem” (lit. “The Name”), reflecting its central importance. The Name … is conventionally translated in scriptures as “Lord.” Within the context of Hebrew grammar, the word … is usually cited as a future tense third person form of the verb root (lit. “to be”). Some regard the word as a composite that combines the past, present, and future tense forms of the verb root.
Orthodoxy has proclaimed the pronunciation of the letter-formula as a Name to be blasphemous. When the Name is encountered in the Torah or when chanting prayers, religious Jews will either pause in silence out of respect or substitute another power name, traditionally “Adonai” ( lit. my Master).
In the Latin Vulgate edition of the Tanakh, Jerome set the precedent of changing the pronunciation of the Yod to “J” and using the vowels from Adonai to produce the anglicized variation “Jehovah.” Jehovah is the way that most contemporary non-Jews pronounce the Name. The Name … is sometimes pronounced “Yaweh,” reflecting the tradition that the High Priest in the Temple of Jerusalem made a monosyllabic pronunciation of the Name … on Yom Kippur (Day of Atonement).
The halachic prohibition specifies to avoid pronouncing the four letters … as a Name. If one is inclined to follow their prohibition, one can use the Atziluthic version wherein the letters are considered to be standing alone, and therefore pronounced individually–“Yod” (as in “code”), “Heh” (as in “day”), “Vav” (as in “love”), “Heh.”
The Atziluthic version can be regarded as the most powerful way of pronouncing the Name …”
–Daniel Feldman, Qabala: The Mystical Heritage of the Children of Abraham, 2001, pg. 168.