Eckhart distinguished God, the Trinity known in relation to creatures, from the Godhead, the silent desert of the divine essence, beyond activity and distinction. The soul’s final breakthrough, he taught, is into this ground. The idea has been compared with nirguṇa Brahman and the Neoplatonic One.
Godhead
In Meister Eckhart, the hidden divine essence beyond the persons of the Trinity, of which nothing can be said.
Also: Gottheit