Bhairava
Shiva in one of his most fearsome, terrifying aspects. In this aspect, He is said to destroy the false self.
When referring to the nondifferentiated essential form of Bhairava or the nondifferentiated Self, Tantric writers are emphasizing the utterly transcendent, uncreated aspect of God. In this aspect God cannot be known intellectually. He is the eternal, witnessing Subject that can never be an object of thought. Although He is the source of those attributes which characterize created objects, He himself cannot be characterized.
The word, Bhairava, can be derived etymologically in two different ways: