The characteristic of being obdurate; stubbornness.

Stubbornly persistent, generally in wrongdoing; refusing to reform or repent. / (obsolete) Physically hardened, toughened. / Hardened against feeling; hard-hearted.

(transitive, obsolete) To harden; to obdure.

In an obdurate manner; stubbornly, intractably or inflexibly.

plural of obduration

(obsolete) A hardening of the heart; hardness of heart.

unyieldingly stubborn

Third-person singular simple present indicative form of obdure

A rigid part of a sigmoidoscope or similar device

present participle of obdure