(Sanskrit) One of the eight major powers (siddhis).
“The power that permits the mystic to submerge within the waters and to live submerged in the waters without receiving any harm. The great Guru-deva Sivananda told us of the case of the Swami Trillinga of Benares (India), who was accustomed to live six months of the year submerged within the waters of the river Ganges.” - Samael Aun Weor, The Aquarian Message
“He (the initiate) can dive into the water and can come out at any time he likes. The late Trilinga Swami of Benares used to live for six months underneath the Ganges. It is the process by which a Yogi makes himself invisible sometimes. By some writers it is defined to be the power of entering body of another (Parakaya Pravesh). Sri Sankara entered the body of Raja Amaruka of Benares. Tirumular in Southern India entered the body of a shepherd. Raja Vikramaditya also did this. It is also the power of keeping a youth-like appearance for any length of time. Raja Yayati had this power.” - Swami Sivananda, Kundalini Yoga