| Term | Definition |
| subliminal | adj. below the threshold |
| submissive | adj. yielding; timid |
| subordinate | adj. occupying a lower rank; inferior; submissive |
| suborn | v. persuade to act unlawfully |
| subpoena | n. writ summoning a witness to appear |
| subsequent | adj. following; later |
| subservient | adj. behaving like a slave; servile; obsequious |
| subside | v. settle down; descend; grow quiet |
| subsidiary | adj. subordinate; secondary |
| subsidy | n. direct financial aid by government |
| subsistence | n. existence; means of support; livelihood |
| substantial | adj. ample; solid; in essential |
| substantiate | v. establish by evidence; verify; support |
| substantive | adj. essential; pertaining to the substance |
| subterfuge | n. pretense; evasion |
| subtlety | n. perceptiveness; ingenuity; delicacy |
| subversive | adj. tending to overthrow; destructive |
| succinct | adj. brief; terse; compact |
| succor | v. aid; assist; comfort |
| succulent | adj. juicy; full of richness |
| succumb | v. yield; give in; die |
| suffragist | n. advocate of voting rights (for women) |
| sully | v. tarnish; soil |
| sultry | adj. sweltering |
| summation | n. act of finding the total; summary |
| subsume | v.include,enompass |
| sumptuous | adj. lavish; rich |
| sunder | v. separate; part |
| supercilious | adj. arrogant; condescending; patronizing |
| superficial | adj. trivial; shallow |
| superfluous | adj. unnecessary; excessive; overabundant |
| superimpose | v. place over something else |
| supersede | v. cause to be set aside; replace; make obsolete |
| supplant | v. replace; usurp |
| supple | adj. flexible; plaint |
| supplicate | v. petition humbly; pray to grant a favor |
| supposition | n. hypothesis; the act of supposing |
| suppress | v. stifle; overwhelm; subdue; inhibit |
| surfeit | v. satiate; stuff; indulge to excess in anything |
| surly | adj. rude; cross |
| surmise | v. guess |
| surmount | v. overcome |
| surpass | v. exceed |
| surreptitious | adj. secret; furtive; sneaky; hidden |
| surrogate | n. substitute |
| surveillance | n. watching; guarding |
| susceptible | adj. impressionable; easily influenced; having little resistance, as to a disease; receptive to |
| sustain | v. experience; support; nourish |
| sustenance | n. means of support, food, nourishment |
| suture | n. stitches sewn to hold the cut edges of a wound or incision |
| swagger | v. behave arrogantly or pompously; strut or walk proudly |
| swarm | n. dense moving crowed; large group of honeybees |
| swarthy | adj. dark; dusky |
| swathe | v. wrap around; bandage |
| swelter | v. be oppressed by heat |
| swill | v. drink greedily |
| swindler | n. cheat |
| sybarite | n. lover of luxury |
| sycophant | n. servile flatterer; bootlicker; yes man |
| symbiosis | n. interdependent relationship. often mutually beneficial |
| symmetry | n. arrangement of parts so that balance is obtained; congruity |
| synoptic | adj. providing a general overview; summary |
| synthesis | n. combining parts into a whole |
| tacit | adj. understood; not put into words |
| taciturn | adj. habitually silent; talking little |
| tactile | adj. pertaining to the organs or sense of touch |
| taint | v. contaminate; cause to lose purity; modify with a trace of something bad |
| talisman | n. charm to bring good luck and avert misfortune |
| talon | n. claw of bird |
| tangential | adj. peripheral; only slightly connected; digressing |
| tangible | adj. able to be touched; real; palpable |
| tanner | n. person who turns animal hides into leather |
| tantalize | v. tease; torture with disappointment |
| tantamount | adj. equivalent in effect or balue |
| suffuse | v.spread over |
| superannuated | adj.retired or disqualified because of age |
| supererogatory | adj.superfluous;more than needed or demanded |
| supernumerary | n.person or thing in excess of what is necessary;extra |
| supine | adj.lying on back |
| suppliant | adj.entreating;beseeching |
| supposititious | adj.assumed;counterfeit;hupothetical |
| swerve | v.deviate;turn side sharply |
| syllogism | n.(in philosophy) a process of logic in which two general statements lead to a more particular statement |
| synchronous | adj.simultaneous with;similarly timed |
| sundry | adj.various;several |
| sylvan | adj.pertaining to the woods;rustic |
| nymph | (noun) a voluptuously beautiful young woman |