ETYM Latin obduratus, p. p. of obdurare to harden; ob + durare to harden, durus hard. Related to Dure.
1. Hardened in feelings, esp. against moral or mollifying influences; unyielding; hard-hearted; stubbornly wicked.
2. Hard; harsh; rugged; rough; intractable.
3. Obstinate; hard-hearted.