That other form of his which is highly terrible performs all the destructive operations in the universe. Because he is great and the Supreme Lord of all (Ishvara), therefore he is called Maheshivara.
यास्य घोरतमा मूर्तिर्जगत् संहरते तथा। ईश्वरत्वान्महत्त्वाच्च महेश्वर इति स्मृतः॥