In Buddhism, the cyclical movement of a wheel is also used to symbolize the cyclical nature of life in the world (also referred to as the "wheel of samsara", "samsara-chakra" or the "wheel of becoming"", bhava-cakra"). This wheel of suffering can be reversed or "turned" through the practice of the Buddhist path. The Buddhist terms for "suffering" (dukkha) and happiness (sukha) may also originally be related to the proper or improper fitting of wheels on a chariot's axle. The Indo-Tibetan tradition has developed elaborate depictions called Bhavacakras which depict the many realms of rebirth in Buddhist cosmology.