Quizlet Kaplan SAT Word List: "O" Words

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  1. obdurate: Stubbornly persistent or determined; resistant to persuasion
  2. obfuscate: To confuse; to make obscure
  3. obstinate: Unreasonably persistent or stubborn
  4. olfactory: Relating to the sense of smell
  5. oligarchy: A government in which a small group holds all of the control
  6. onus: A burden or obligation
  7. opine: To express an opinion or feeling
  8. opportunist: One who takes advantage of any chance to achieve an end, with little regard for morals or principles
  9. opprobrious: Disgraceful; shameful
  10. ornery: Having an irritable disposition or mood; cantankerous
  11. oscillate: To swing back and forth like a pendulum; to vary between opposing beliefs or feelings
  12. ossify: To change into bone; to become hardened or set
  13. ostracize: To exclude or reject from a group by common consent
  14. oust: To remove a title or position by force; eject