253. Recondite, Obscure

Obscure: Not clear

254. Redolent, Fragrant

Redolent: Having a strong smell
Fragrant: Pleasantly scented

255. Redundant, Superfluous

Redundant: Unnecessary repetition
Superfluous: More than needed

256. Refractory, Stubborn

Refractory: Hard to control

257. Refulgent, Radiant

Refulgent: Shining brightly
Radiant: Emitting light

258. Relegate, Demote

Relegate: Assign to a lower rank
Demote: Reduce status

259. Remonstrate, Protest

Remonstrate: Object strongly
Protest: Express objection

260. Renegade, Traitor

Renegade: One who betrays
Traitor: Disloyal person

261. Repudiate, Reject

Repudiate: Refuse to accept
Reject: Dismiss

262. Rescind, Revoke

Rescind: Cancel officially
Revoke: Withdraw

263. Reticent, Reserved

Reserved: Keeping to oneself

264. Retrospect, Review

Retrospect: Looking back
Review: Examine again