Jahi is the Avestan language name of Zoroastrianism's demoness of "lasciviousness." As a hypostatic entity, Jahi is variously interpreted as "hussy," "rake," "libertine," "courtesan" and "one who leads a licentious life." Her standard epithet is "the Whore."
In Zoroastrian tradition, Jahi appears as Middle Persian Jeh (Jēh, J̌ēh), characterized as the consort of Ahriman and the cause of the menstrual cycle.
In the hymn to Haoma, the devotee rejects the temptations of the "polluting whore" who "sits down devouring Haoma's sacrificial offering" (Yasna 10.15). In the hymn to Asha, the Holy term (manthra spenta) is an effective remedy against Jahi and other noxious creatures (Yasht 3.9). In the hymn to Ashi (not to be confused with Asha), "Fortune" wails about how shamed she is by Jahi's improper actions (Yasht 17.57-58).
In Vendidad 18.62, Jahi is characterized as causing Ahura Mazda "the most grief". "Her gaze takes the colors away from a third of [world]" (Vendidad 18.64). Vendidad 21.1 contains an oblique reference to Jahi's cosmological role as the killer of Gav-aevo.data (MP: Gawi ewdad), the primordial creature from whose seed all animal creation originates.
In the Sudgar Nask, an Avestan text that has not survived but the contents of which are summarized in Denkard 9, fire is sickened by the stench and filth of Jahi and by the irritant "owing to the hussy who, dropping her knee on to the fire-stand, arranged her curls; the falling of damp and moisture from her head, with the hair and filth therefrom" (9.1.10.6).