| A | B |
| ruminate | to meditate on; to ponder; to think about over and over |
| ruse | a crafty stratagem or plan |
| rustic | of, relating to, or typical of country life |
| saccharine | having a cloyingly sweet attitude, tone, or character |
| sagacious (SAGE wisdom + OUS full of) | possessing wisdom. |
| sate (SAT enough) | to supply beyond capacity or desire |
| scourge | a source of widespread dreadful affliction and devastation such as that caused by pestilence or war. |
| scurrilous | given to the use of vulgar, coarse, or abusive language; foul-mouthed |
| sedate (SED sit + ATE cause) | habitually calm and composed in manner; serene |
| seminal | highly influential in an original way; constituting or providing a basis for further development |
| serendipity | the act of finding things not sought; good luck or fortune |
| sinuous (related to sinews) | curving in and out |
| somnolent (SOMN sleep + LENT full of) | drowsy; sleepy. |
| spectral (SPECT look or see) | ghostly |
| spurious | false but deceptively made out to be believable or possible |
| squalid | having a dirty, mean, poverty-stricken appearance. |
| stagnate (STA stop or stay + -ATE cause) | to stop developing, growing, flowing, etc. |
| static (STA stop or stay) | not moving, being at rest |
| stolid | having or revealing little emotion or sensibility; impassive |
| strenuous | requiring great effort, energy, or exertion |
| strife | heated, often violent dissension; bitter conflict |
| stultify | to make or cause to appear, foolish, or ridiculous |
| stupefy | to overwhelm with amazement; astound; astonish. |
| succinct | characterized by clear, precise expression in few words; concise and terse |
| succulent (sucking + LENT full of) | full of juice or sap; juicy |