'Hard' in the Bible

And they made their lives bitter with hard work with mortar and with bricks and with all [sorts] of work in the field--with all their work in which they ruthlessly enslaved them.

And Moses spoke thus to the {Israelites}, but they did not listen to Moses, because of {discouragement} and because of hard work.

And Pharaoh's heart was hard, and he did not listen to them, as Yahweh had said.

And the magicians of Egypt did likewise with their secret arts, and Pharaoh's heart was hard, and he did not listen to them, as Yahweh had spoken.

And the magicians said to Pharaoh, "It is the finger of God." But the heart of Pharaoh was hard, and he did not listen to them, as Yahweh had spoken.

And Pharaoh's heart was hard, and he did not release the {Israelites}, as Yahweh had said {by the agency of Moses}.