Hardened - Different words in the Hebrew. In Exodus 9:34 the word means “made heavy,” i. e. obtuse, incapable of forming a right judgment; in Exodus 9:35 it is stronger, and implies a stubborn resolution.
Related Commentaries of Exodus 9:35
Exodus 9:35
35 And the heart of Pharaoh was hardened, neither would he let the children of Israel go; as the LORD had spoken by Moses.c