reading G's links started looking more at EIS:
eis- :: In words denoting passion. 1. Suffixed form *eis-a-. IRASCIBLE, IRATE, IRE, from Latin ira, anger. 2. Suffixed zero-grade form *is-(e)ro-, powerful, holy. HIERATIC, HIERO-; HIERARCH, HIERARCHY, HIERODULE, HIEROGLYPHIC, HIEROPHANT, from Greek hieros, "filled with the divine," holy. 3a. IRON, from Old English ise(r)n, ren, iron; 3b. GISARME, SPIEGELEISEN, from Old High German isarn, isan, iron. Both a and b from Germanic *isarno-, "holy metal" (possibly from Celtic). 4. Suffixed o-grade form *ois-tro-, madness. ESTRUS; ESTROGEN, ESTRONE, from Greek oistros, gadfly, goad, anything causing madness. 5. Suffixed form *eis-mo. ASMODEUS, from Avestan aesma-, anger. (also at bartlby.com)
Seid :: (Old Norse: seiðr, sometimes anglicized as "seidhr", "seidh", "seidr", "seithr" or "seith") was a form of shamanism practised by pre-Christian Norse and arguably other Germanic cultures and continued in modern times by people who practice the reconstructionist beliefs of Ásatrú or heathenry. It involved the incantation of spells, which could amongst other things be termed galdrar or galðrar (sing. galdr or galðr, compare Old English: gealdor or galdor). Practitioners of seid were predominantly women (völva, or seiðkona, lit. seid woman). Although there were male practitioners (seiðmaðr, lit. seid man) as well, in the Viking Age, seid was considered ergi (perversity) for men, as its manipulative aspects ran counter to the male ideal of forthright, open behaviour. The goddesses of Norse mythology were also practitioners of seid, along with Odin, a fact of which he was apparently ashamed, for the above mentioned reason.
Verbal Rune Magic :: Galdr or Galdor, from the Old Norse, originally meant 'incantation'. The verb "gala" is also used for "to crow" (ASLÖG aka Kraka (Crow)). It later came to mean magic in general. These are the sounds used in runic oral spells. [provides Galdr Chants for all runes & sources].
went on a norse mythology binge adding: ERDA, ISHTAR, SIGURD, NJORD, HODIOS, FRIGGA, BRUNHILD, BRIGITTA, TOLKIEN, HILDEGARD, FERONIA, LOBELIA, SILKE, ORNAMENTA, GERDA, VALA, HERTHA, URDA, IDUNA, KOLGA, THORA, GUDRUN, YRSA, INGEBORG, SIGNE, WERDANDI, GUNLÖD, EDDA, ASLÖG, PLATEAU, SPICER, AEOLIA, GRYPHON, GARUDA, TARDIS, AERIA, AETERNITAS, AETHRA, IRANI, HARMONIA & DENEB EL ADIGE.
Ayanamsa is the difference between Tropical (Sayana) & Sidereal (Nirayana) zodiacs; Cyril Fagan chose Spica, the Ear of Wheat,, as the fiducial point [sometimes called the synetic vernal point], defining it as lying at 29 degrees Virgo in the zodiac [not 0 Libra as above in the Lahiri ayanamsha]. Fagin argued that this was in better agreement with the method used by the ancient Babylonians to describe the Zodiac (source; also Planet Longitudes in Babylonian Horoscopes).
Sidereal Astrology: The Tropical and Sidereal Zodiaks & The Cycle of the Holy Cross :: Thus, the Galactic Ayanamsa is defined by setting the GEN (Gate of God) to exactly 5°00’00” sidereal Sagittarius. The Galactic Ayanamsa is 25°00’00” @ 2000 A.D. Thus, 0° Tropical Aries currently resides at 5°00’ sidereal Pisces @ 2000 A.D. and the tropical zodiak has drifted from the fixed sidereal zodiak by 25°00’00” based upon the Galactic Ayanamsa.