i Register
In some senses, obdurate is marked as obsolete. Watch for register when choosing this word.
obdurate
UK /ˈɒbdʒʊɹɪt/ US /ˈɑbd(j)ʊɹɪt/
adj 3verb 1
Definitions
adj
1
Stubbornly persistent, generally in wrongdoing; refusing to reform or repent.
[…] sometimes the very custom of evil making the heart obdurate against whatsoever instructions to the contrary […]
Art thou obdurate, flintie, hard as ſteele? / Nay more then flint, for ſtone at raine relenteth: […]
2
Physically hardened, toughened.
The past is obdurate for the same reason a turtle's shell is obdurate: because the living flesh inside is tender and defenseless.
3
Hardened against feeling; hard-hearted.
I fear the gentleman to whom Miss Amelia's letters were addressed was rather an obdurate critic.
verb
1
To harden; to obdure.
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