This word is repeated in the title of a 9th-century laboratory book by the Persian scholar al-Rāzī that describes alchemical ways to produce materials like caustic soda. For 10 points each:
[10h] Give this adjective that titles a semi-mythological biography of Genghis Khan, which is the oldest work of Mongol literature.
ANSWER: secret [accept the Secret of Secrets or Book of Secrets or Sirr al-Asrar; accept the Secret History or Secret History of the Mongols]
[10e] al-Rāzī is credited as the first physician to distinguish smallpox and this other infectious disease, whose modern vaccine is combined with ones for mumps and rubella in MMR.
ANSWER: measles
[10m] Centuries after al-Rāzī, this ruler’s grandson Ulugh Beg sponsored Persian scholars in several hospitals and observatories. This Turco-Mongol conqueror created several pyramids of skulls and walked with a limp.
ANSWER: Timur [or Tamerlane or Tamburlaine; or Timur the Lame or Timur Lenk or Timur-i Lang; or Temür Küregen or Timūr Gurkānī; accept Timurid Empire or Timurid dynasty or the Timurids or Gūrkāniyān]
<Editors, World History>