S

sacrosanct - adj. must be kept sacred
salubrious - adj. favorable to health of mind or body; promoting health; healthful
saturnalian - Of unrestrained and intemperate jollity; riotously merry; dissolute.
savoir-faire - noun social skill
sine qua non - something essential, irreplaceable
sic - adv. intentionally so written (used after a printed word or phrase); verb urge a dog to attack someone
stigmatize - verb mark with a stigma or stigmata; to accuse or condemn or openly or formally or brand as disgraceful
sub rosa - adv in secret, privately
supervene - verb take place as an additional or unexpected development
sublimate - adj. made pure; noun the product of vaporization of a solid; verb direct energy or urges into useful activities; vaporize and then condense right back again; change or cause to change directly from a solid into a vapor without first melting; remove impurities from, increase the concentration of, and separate through the process of distillation; make more subtle or refined
sycophant - noun a person who tries to please someone in order to gain a personal advantage
symptomatic - adj. relating to or according to or affecting a symptom or symptoms; characteristic or indicative of e.g. a disease
syndrome- (noun) a complex of concurrent things; a pattern of symptoms indicative of some disease
systemic - adj. affecting an entire system