Top 25 SAT Vocabulary words Obdurate – Stubborn, inflexible. Preclude – Prevent, prohibit. Reticent – Reserved, withdrawn. Spurious – Fake. Tenacious – Tight, firm. Verbose – Talkative. Wistful – Reflective. These are just a few words which are a common sighting during the exam. More items... Jun 2, 2015