This word is perhaps ABRAHADABRA, the sacred word of 11 letters.
For this word see Appendix. {WEH NOTE: The Appendix has not yet been recovered. Kenneth Grant, in his "Magical and Philosophical Commentaries ..." pp. 105-108 has a lengthy extension here. The providence of the extension is not definitely known to be Crowley at this writing, hence cannot be included here.}.
ABRAHADABRA is "The key of the rituals" because it expresses the Magical Formulae of uniting various complementary ideas; especially the Five of the Microcosm with the Six of the Macrocosm.