obdurate
UK: ˈɒbdjʊrət | US: ˈɑːbdʊrət
adj. stubbornly refusing to change one's opinion or course of action
adj. hardened in feelings or morally unyielding
The word "obdurate" traces back to Latin obduratus, the past participle of obdurare ("to harden against"), combining ob- ("against") and durus ("hard"). The root dur (as in "durable" or "endure") reflects physical or metaphorical hardness. Over time, "obdurate" evolved in English to emphasize emotional or moral stubbornness, retaining its core idea of resistance.
Despite appeals for mercy, the judge remained obdurate in his sentencing.
Her obdurate refusal to compromise stalled the negotiations.
Years of criticism had made him obdurate to others' opinions.
The obdurate rock resisted even the strongest tools.
His obdurate heart showed no sympathy for their plight.