Dingir
Dingir, Digir (Sumerian DINGIR, Digir, emesal dim -me- he; Akkadian ) is the Sumerian singular term for divine beings divine objects and divine mysticism. In the plural Dingir was doubled and used as Dingir - Dingir.
As a determinative before the respective terms DINGIR was, in short D, although written and read, but not pronounced. In the transcription of the cuneiform texts Determinative how Dingir superscript to designate them as such.
The determinative Dingir was not used for deities that start with AN because AN was commonly used as a logogram for the sky and represented the highest god AN as the father of Dingir - Dingir (father of all divine ). According to the Sumerian mythology was all divine, what was with AN in context.
As Sumerogramm DINGIR was used in later times, for example in the Akkadian and Hittite language. Sumerogramme were by the 1st century BC in use.