https://en.wikipedia.org/wiki/Bardo_Thodol
Bardo Thodol
The Tibetan Book of the Dead, is a text from a larger corpus of teachings, the Profound Dharma of Self-Liberation through the Intention of the Peaceful and Wrathful Ones, revealed by Karma Lingpa (1326–1386). It is the best-known work of Nyingma literature.
The Tibetan text describes, and is intended to guide one through, the experiences that the consciousness has after death, in the bardo, the interval between death and the next rebirth. The text also includes chapters on the signs of death and rituals to undertake when death is closing in or has taken place.
Bar do thos grol translates as:
bar do: "intermediate state", "transitional state", "in-between state", "liminal state". Valdez: "Used loosely, the term 'bardo' refers to the state of existence intermediate between two lives on earth." Valdez: "The concept arose soon after the Buddha's passing, with a number of earlier Buddhist groups accepting the existence of such an intermediate state, while other schools rejected it."
thos grol: thos means hearing as well as philosophical studies. Grol means "liberation", which is synonymous with the Sanskrit word bodhi, "awakening", "understanding", "enlightenment", and synonymous with the term nirvana, "blowing out", "extinction", "the extinction of illusion".