DenkardThe Dēnkard or Dēnkart (Middle Persian: 𐭣𐭩𐭭𐭪𐭠𐭫𐭲 "Acts of Religion") is a 10th-century compendium of Zoroastrian beliefs and customs during the time. The Denkard is to a great extent considered an "Encyclopedia of Mazdaism" and is a valuable source of information on the religion especially during its Middle Persian iteration. The Denkard is not considered a sacred text by a majority of Zoroastrians, but is still considered worthy of study.
VendidadThe Vendidad /ˈvendi'dæd/ or Videvdat or Videvdad is a collection of texts within the greater compendium of the Avesta. However, unlike the other texts of the Avesta, the Vendidad is an ecclesiastical code, not a liturgical manual. The name of the texts is a contraction of the Avestan language Vî-Daêvô-Dāta, "Given Against the Daevas (Demons)", and as the name suggests, the Vendidad is an enumeration of various manifestations of evil spirits, and ways to confound them.
BundahishnBundahishn (Middle Persian: , "Primal Creation") is the name traditionally given to an encyclopedic collection of Zoroastrian cosmogony and cosmology written in Book Pahlavi. The original name of the work is not known. Although the Bundahishn draws on the Avesta and develops ideas alluded to in those texts, it is not itself scripture. The content reflects Zoroastrian scripture, which, in turn, reflects both ancient Zoroastrian and pre-Zoroastrian beliefs.
AhrimanAngra Mainyu (ˈæŋrə_ˈmaɪnjuː; Avestan: 𐬀𐬢𐬭𐬀⸱𐬨𐬀𐬌𐬥𐬌𐬌𐬎 Aŋra Mainiiu) is the Avestan name of Zoroastrianism's hypostasis of the "destructive/evil spirit" and the main adversary in Zoroastrianism either of the Spenta Mainyu, the "holy/creative spirits/mentality", or directly of Ahura Mazda, the highest deity of Zoroastrianism. The Middle Persian equivalent is Ahriman 𐭠𐭧𐭫𐭬𐭭𐭩 (anglicised pronunciation: ˈɑːrɪmən). The name can appear in English-language works as Ahrimanes. Avestan angra mainyu "seems to have been an original conception of Zoroaster's.
YasnaYasna (ˈjʌsnə; ,) is the Avestan name of Zoroastrianism's principal act of worship. It is also the name of the primary liturgical collection of Avesta texts, recited during that yasna ceremony. The function of the yasna ceremony is, very roughly described, to strengthen the orderly spiritual and material creations of Ahura Mazda against the assault of the destructive forces of Angra Mainyu. The yasna service, that is, the recitation of the Yasna texts, culminates in the apæ zaothra, the "offering to the waters.
RashnuRashnu (𐬭𐬀𐬴𐬢𐬏) is the Avestan language name of the Zoroastrian yazata of justice. Together with Mithra and Sraosha, Rashnu is one of the three judges who pass judgment on the souls of people after death. Rashnu's standard appellation is "the very straight." In the Bundahishn, a Zoroastrian account of creation finished in the 11th or 12th century, Rashnu (Middle Persian: Rashn) is identified as an assistant of the Amesha Spenta Ameretat (Amurdad), "immortality". (GBd xxvi.115).
KhvarenahKhvarenah (also spelled khwarenah or xwarra(h): 𐬓𐬀𐬭𐬆𐬥𐬀𐬵 ) is an Avestan word for a Zoroastrian concept literally denoting "glory" or "splendour" but understood as a divine mystical force or power projected upon and aiding the appointed. The neuter noun thus also connotes "(divine) royal glory", reflecting the perceived divine empowerment of kings. The term also carries a secondary meaning of "(good) fortune"; those who possess it are able to complete their mission or function.
AshavanAshavan (Avestan: 𐬀𐬴𐬀𐬬𐬀𐬥 ašavan) is a Zoroastrian theological term. It literally means "possessing/mastering aša" and has been interpreted as "possessing/mastering truth" or "possessing/mastering righteousness", but has further implications: It is an epithet of Ahura Mazda (Yasht 1.12). The term may then be applied to anything within the domain of Ahura Mazda and/or Aša (i.e. all of Creation), and excludes only that which is drəgvant "possessing lie" (YAv: drvant).
FrashokeretiFrashokereti (𐬟𐬭𐬀𐬴𐬋⸱𐬐𐬆𐬭𐬆𐬙𐬌 frašō.kərəti) is the Avestan language term (corresponding to Middle Persian 𐭯𐭫𐭱(𐭠)𐭪𐭥𐭲 fraš(a)gird ) for the Zoroastrian doctrine of a final renovation of the universe, when evil will be destroyed, and everything else will be then in perfect unity with God (Ahura Mazda).
ZahhakZahhāk or Zahāk (zæhɒːk) (ضحّاک), also known as Zahhak the Snake Shoulder (Zahhāk-e Mārdoush), is an evil figure in Persian mythology, evident in ancient Persian folklore as Azhi Dahāka (اژی دهاک), the name by which he also appears in the texts of the Avesta. In Middle Persian he is called Dahāg (دهاگ) or Bēvar Asp (بیور اسپ) the latter meaning "he who has 10,000 horses". In Zoroastrianism, Zahhak (going under the name Aži Dahāka) is considered the son of Ahriman, the foe of Ahura Mazda.