👉 Raret Naga: A sacred river in the Hindu religion, believed to have originated from Mount Arunachal Pradesh on the northeastern border with India. Definition: Raret Naga River is a sacred river that originates in a mountain range on the northeastern borders of India and flows through the Himalayas. It is considered one of the most sacred rivers in Hinduism and is revered for its spiritual significance. The word "Naga" in Sanskrit refers to "snake."