Concept

Apaosha

Résumé
Apaosha (Apaoša, Apauša) is the Avestan language name of Zoroastrianism's demon of drought. He is the epitomized antithesis of Tishtrya, divinity of the star Sirius and guardian of rainfall. In Zoroastrian tradition, Apaosha appears as Aposh or Apaush. For many decades, the Avestan common noun apaosha- "drought" was thought to derive from either *apa-uša- "burning away" or *apa-vṛt(a)- "stemming the waters." In the late 1960s, it was proposed that apaoša- was the antonym of an unattested derivative of *pauša- "thriving". This explanation, which is also supported by Old Indic with the same meaning, is today well accepted. Avestan apaoša- thus originally meant "not thriving". In the mythology of Yasht 8.21-29, Tishtrya, as a mighty white horse with golden ears and golden tail, rushes towards the cosmic sea Vourukhasha. On his way, he is confronted by Apaosha as a horrible black horse with black ears and black tail. They battle for three days and nights until Apaosha drives Tishtrya away. Tishtrya then complains to Ahura Mazda that he was weakened because humankind did not give him his due of proper prayers and sacrifices. Ahura Mazda then himself offers sacrifice to Tishtrya, who now strengthened reengages Apaosha in battle at noon and conquers the demon of drought. Tishtrya then causes the rains to fall freely upon the earth and all is well again. This legend has been interpreted to be a mythological conflation of a seasonal and astronomical event: The heliacal rising of Sirius (with which Tishtrya is associated) occurred in July, just before the hottest and driest time of the year. For the next few days, Sirius is visible at dawn as a glimmering star (doing battle with Apaosha). In the torrid summer months, as Sirius becomes more directly visible, the light of the star appears to grow stronger (Tishtrya gathering strength) until it is steadily visible in the firmament (Apaosha vanquished). With the defeat of Apaosha, the rainy season begins (in late autumn). A mythological explanation of the heliacal setting of Sirius is only alluded to in the Avesta: In Yasht 18.
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