Introduction
Taurvi is one of the six chief daevas of Zoroastrianism, opposed to the Amesha Spenta Haurvatat, "Wholeness" or "Health". Where Haurvatat represents bodily well-being and completeness, Taurvi represents its opposite: sickness, injury and physical corruption.
Zoroastrianism inherited many divine names from the older, shared Indo-Iranian religious tradition ancestral to both Zoroastrianism and Vedic Hinduism, but its strict ethical dualism recast several of these figures as daevas, evil spirits opposing Ahura Mazda and the Amesha Spentas, in deliberate contrast to their positive standing (as Devas) in the Vedic tradition. The six chief daevas each specifically oppose one Amesha Spenta.
Opposition to health
As the daeva of disease and ill health, Taurvi is understood in Zoroastrian cosmology as one of the many afflictions Angra Mainyu introduced into Ahura Mazda's originally perfect creation, working specifically to undermine bodily wholeness and vitality.
Paired with Zairicha
Taurvi is frequently named alongside Zairicha, the daeva opposed to Ameretat (Immortality), the two forming a natural pair (sickness and death, or disease and poison) just as their opposing Amesha Spentas Haurvatat and Ameretat (health and immortality) are paired as representing the complete arc from bodily wellness to eternal life.