Inner heat ("gtum mo", skt. "chandali," literally meaning "fierce, hot or savage woman") practice is the foundation for the rest of the six dharmas and is the first of the six dharmas. This practice works with the subtle body (also known as the "vajra-body") system of channels ("nadis"), winds ("lung, vayu"), drops ("bindus") and chakras. Through inner heat, the vital winds are caused to enter into the central channel ("avadhuti"), causing the four blisses or joys which is then unified with the wisdom that understands emptiness.