| stolid | Having or expressing little or no sensibility; unemotional | |
| storied | Having a history; celebrated in history or legend. | |
| stratagem | A plan, scheme, or trick for surprising or deceiving an enemy | |
| streamlined | Designed or organized to be efficient and easy to use | |
| strenuous | Requiring or using great exertion or physical effort | |
| stricture | A critical remark or comment, especially one that restricts or puts constriction on something | |
| strident | Loud and harsh; grating | |
| stringent | Strict, precise, and exacting | |
| stupefied | To be astonished or shocked so much that one is temporarily unable to react | |
| subjective | Based on or influenced by personal feelings, tastes, or opinions | |