Obdurate means stubbornly refusing to be moved or softened. Remain obdurate, an obdurate refusal, obdurate in the face of pleading.
It is stronger than stubborn because it implies a hardness against appeals to feeling. The Latin is hardened, and the word keeps that physical picture.
1adjectiveobdurateStubbornly refusing to be moved or softened.
“The committee remained obdurate despite a room full of objections.”
obdurate is a quality.
Latin obduratus is the past participle of obdurare, to harden, from ob plus durus, hard.
Latin
obdūrātus — hardened
Middle English
obdurat
English, today
obdurate
Built from
1450s, in Middle English; Middle English obdurat, borrowed from Latin obdūrātus (“hardened”), perfect passive participle of obdūrō (“to harden”) (see -ate), from ob- (“against”) + dūrō (“to harden, render hard”), from dūrus (“hard”). Compare durable, endure.
Etymology from Wiktionary, CC BY-SA