Trina's obdurate little girl refused to eat her vegetables at dinner.2. Hardened in feelings or heart; not repentant: Bob's cousin was an obdurate criminal who refused to change his ways.
3. Etymology: from Latin ob-, "against" + durus, "hard", therefore "hardened against".
The Latin durus, "hard", has also given English such words as "durable" and "duration" (the period of time during which anything is hard enough to last), and "duress" (hard treatment, or coercion, which forces a person to do something even when he or she doesn't want to do it).
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2. Unyielding in feeling or persuasion. (3)