from Wiktionary, Creative Commons Attribution/Share-Alike License
- proper n. 17 hymns believed to have been composed by Zarathustra (Zoroaster) himself. They are the most sacred texts of the Zoroastrian faith.
From Avestan 𐬔𐬁𐬚𐬁𐬯 (Gāθās), from the Proto-Indo-Iranian *gāyati-, from the Proto-Indo-European *gē(y)- (“to sing, to cry”). (Wiktionary)