Literally, coiling. The Kundalini is described as a coiled snake at the base of the spine, but it's better imagined as a reserve of potential energy. When the Kundalini is awakened, the snake will uncoil and arise, and the potential of the individual will be realized. Kundalini is awakened by various methods... chanting mantras, service to others, etc. Also possibly awakened by a kiss on the ass. Awakening the Kundalini is the first step towards enlightenment.