The term is a combination of chiram, or 'permanent', and jīvi, or 'lived'. It is similar to amaratva, which refers to true immortality. At the end of the last Manvantara, a demon attempted to become immortal by swallowing the sacred pages of Vedas, as they escaped from the mouth of Brahma. The scripture was retrieved by the first avatar (Matsya) of Lord Vishnu. Incarnations of Vishnu (Narasimha and Rama) also later fought and killed two other asuras, Hiranyakasipu and Ravana, who tried to become immortal through obeisance to Lord Brahma and Lord Shiva, respectively. In one sense immortal can mean to live eternally until the destruction of Universes, i.e., all physical bodies are foretold to become immaterial at the end of time, along with the Brahma himself, with the destruction of the Universe.