Brahma." ~ Katha Upanishad I Aum (also Om , written in Devanagari as ॐ ,written in Tamil as ஓம், in Chinese as 唵 , in Japanese as オーム or オーン , in Tibetan as ༀ , in Sanskrit known as praṇava प्रणव lit. "to sound out loudly" or oṃkāra ओंकार lit.