祅: 
1. Same as "妖" (yao), meaning something supernatural or strange.
2. Noun: Refers to an occurrence that is ghostly, unusual, or bizarre. Same as "妖." 
   - Example from "Han Shu" (Book of Han), Volume 22, Section on Rites and Music: "Deceit and falsehood do not arise;祅 (xian) troubles lie dormant." 
   - Example from "Wen Xuan" (Selections of Refined Literature), by Li Kang: "King You's infatuation with Bao Nü began during the Xia court;祅 (xian) originated there."
3. Noun: See "祆教" (Xianjiao) for more information. 
   - This also refers to things that are ghostly, unusual, or bizarre, synonymous with "妖." 
(Note: "祆教" (Xianjiao) refers to the Zoroastrianism religion, and further explanations would be necessary in that context.)