1. sine qua non a prerequisite
  2. Sinequan a tricyclic antidepressant with numerous side effects
  3. cinchonine an alkaloid derivative of the bark of cinchona trees that is used as an antimalarial drug
  4. Sinkiang an autonomous province in far northwestern China on the border with Mongolia and Kazakhstan; the largest province in the People's Republic of China and the homeland of the Uighur people
  5. Singan a city of central China
  6. sanction official permission or approval
  7. sanguine confidently optimistic and cheerful
  8. sneaking not openly expressed
  9. sign on engage by written agreement
  10. singing the act of singing vocal music
  11. sink in pass through
  12. sinking a slow fall or decline (as for lack of strength)
  13. sanguineous accompanied by bloodshed
  14. Sanguinaria one species: bloodroot
  15. sanguinary accompanied by bloodshed
  16. sanguinity feeling sanguine; optimistically cheerful and confident
  17. sneakiness a disposition to be sly and stealthy and to do things surreptitiously
  18. Sun Yixian Chinese statesman who organized the Kuomintang and led the revolution that overthrew the Manchu dynasty in 1911 and 1912 (1866-1925)
  19. Mancunian of or relating to or characteristic of the English city of Manchester or its residents
  20. sanguineness feeling sanguine; optimistically cheerful and confident

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