“Holder;” vagina; source; womb. According to Tantra Yoga, the yoni is the origin of life, the source of the Universe, and is associated with prakriti (the Universal Substance). In Hinduism, the yoni is a symbol of Shakti (the creative force that moves the Universe). The graphic symbol of the yoni is an inverted triangle—the three sides of which represent the gunas (the basic modalities of Nature).