277. Stoic, Unemotional

Stoic: Enduring pain without complaint
Unemotional: Not expressing feelings

278. Strident, Harsh

Strident: Loud and grating
Harsh: Rough in sound

279. Sublime, Exalted

Sublime: Of great excellence
Exalted: Elevated in rank

280. Substantiate, Verify

Substantiate: Support with proof
Verify: Confirm truth

281. Surreptitious, Secretive

Surreptitious: Done secretly
Secretive: Concealing intentions

282. Tacit, Implied

Tacit: Understood without saying
Implied: Suggested indirectly

283. Tenuous, Weak

Tenuous: Slight or insubstantial

284. Timorous, Fearful

Timorous: Showing fear
Fearful: Afraid

285. Torpid, Sluggish

Sluggish: Slow

286. Tractable, Manageable

Tractable: Easy to control
Manageable: Easy to handle

287. Transient, Fleeting

Fleeting: Passing quickly

288. Trepidation, Fear

Trepidation: Nervous fear
Fear: Feeling of dread