''Ada is a female demonic spirit, usually considered as having her origin from the eastern heaven. She could appear in various forms (anthropomorpic, zoomorphic, she is able to take the forme of houshold goods) and is very harmful for children (..) The word ada (mong.) is used in modern mongolian and mean obstacle, when its root takes the suffix having the meaning of together, but it could also mean capable. In the myth about ada we find an important about the evil; it originate from the eastern heaven, from that part belonging to the eastern malevolent god Ataa Ulaan'' Agnes Birtalan, Systematization of the concept of demonic in mongolian folk religion, 2006.