Noah Webster's Dictionary 1. (a.) Hardened in feelings; unyielding; hard-hearted; stubbornly wicked. 2. (a.) Hard; harsh; rugged; rough; intractable. 3. (v. t.) To harden.

Multi-Version Concordance Obdurate (2 Occurrences) Exodus 7:3 And I will render Pharaoh's heart obdurate, and multiply my signs and my wonders in the land of Egypt. (DBY) Deuteronomy 2:30 But Sihon the king of Heshbon would not let us pass by him; for Jehovah thy God hardened his spirit, and made his heart obdurate, that he might give him into thy hand, as it is this day. (DBY)