superior

1. The letter A is Bhagvān Brahmā ; 
2. the letter “U” is Bhagvān Hari; 
3. the letter “M” is Bhagvān Rudra and
4.  the half letter m is Maheśvarī, the Supreme Mother of the universe. 

The sages, therefore, consider Viṣṇu superior to Brahmā; they again consider Rudra superior to Viṣṇu and Māheśvarī (Turīya State) again superior to Rudra. The speciality of the half letter is that it can never be uttered; it is the symbol of the Eternal Devī.

https://freeglobaluniversity.blogspot.com/search/label/AumAmenAmeen