Durga (Hindustani pronunciation: d̪uːrgaː; Sanskrit: दुर्गा); meaning 'the inaccessible' or 'the invincible') is a popular fierce form of the Hindu Goddess or Devi. She is depicted with multiple (variously, up to ten) arms, carrying various weapons and riding a ferocious lion or tiger. She is often pictured as battling or slaying demons, particularly Mahishasura, the buffalo demon. For the Goddess-worshipping Shaktas, Durga is sometimes equated with Mahadevi, the Supreme Goddess. Her triumph as Mahishasura Mardini, Slayer of the buffalo Demon is a central episode of the scripture Devi Mahatmya. Her victory is celebrated annually in the festivals of Navaratri and Durga Puja.