| swathe | A broad strip or area of something | |
| susceptible | likely or liable to be influenced or harmed by a particular thing | |
| surreptitious | Kept secret, especially because it would not be approved of | |
| surmise | Suppose that something is true without having evidence to confirm it | |
| surly | Bad-tempered and unfriendly | |
| superficial | existing or occurring at or on the surface | |
| sumptuary | relating to or restricting the expenditure of money | |
| sullen | bad-tempered and sulky; gloomy | |
| succumb | To yield or give in to an overpowering force or desire | |
| succor | Assistance and support in times of hardship and distress | |