\IHVH\ [Written also {JHVH}, {YHVH}.]
A transliteration of the four constants forming the Hebrew
tetragrammaton or ``incommunicable name'' of the Supreme
Being, which in latter Jewish tradition is not pronounced
save with the vowels of adonai or elohim, so that the true
pronunciation is lost.
Note: Numerous attempts have been made to represent the
      supposed original form of the word, as Jahaveh, Jahvaj,
      Jahve, Jahveh, Yahve, Yahveh, Yahwe, Yahweh, etc.