Emily Dickinson Lexicon

OB'DU-RATE, a. [L. obduro, to harden; ob and duro.]

1. Hardened in heart; inflexibly hard; persisting obstinately in sin or impenitence.
2. Hardened against good or favor; stubborn; unyielding; inflexible. The custom of evil makes the heart obdurate against whatsoever instructions to the contrary. Hooker.
3. Harsh; rugged; as, an obdurate consonant. [Little used.] Swift.