Word Origin :From Greek, (to) tetragrammaton "(the word) of four letters," from tetra- "four" + gramma (genitive grammatos) "letter, something written". The Hebrew divine name, transliterated as YHWH, usually vocalized in English as "Yahweh."The Definition of Tetragrammaton : The four Hebrew letters usually transliterated YHWH that form a biblical proper name of God, compare yahweh