OB-stuh-nut
(adjective) Stubbornly refusing to change one’s opinion or course of action.
Despite undeniable evidence, he remained obstinate in his belief that the earth was flat.
Fun Fact
“Obstinate” shares roots with the word “obstacle.” While it’s often negative, the trait has sometimes been admired in revolutionaries, inventors, and activists. Historical figures from Galileo to Rosa Parks were once described as obstinate for defying norms.
sur-up-TISH-us
(adjective) Kept secret, especially because it would not be approved of; stealthy or secretive.
She cast a surreptitious glance at her phone during the meeting.
Late Middle English: from Latin “surreptitius,” from “surripere” meaning “to take away secretly,” from “sub-” (secretly) + “rapere” (to seize).
Fun Fact
Surreptitious behavior isn’t necessarily illegal or immoral—it’s just done on the sly because it wouldn’t be approved. Surreptitious glances at your watch during boring presentations, surreptitious snacking before dinner, surreptitious phone checks during conversations—these minor sneaky acts define modern life. The word shares its Latin root with “rapture” through the idea of seizing, though surreptitious seizing happens quietly rather than ecstatically. Spy novels love the word for describing covert operations, but everyday surreptitious acts are far more common than espionage, making it the perfect word for socially awkward secret-keeping.
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