'Hard' in the Bible

So they appointed taskmasters over them to afflict them with hard labor. And they built for Pharaoh storage cities, Pithom and Raamses.

and they made their lives bitter with hard labor in mortar and bricks and at all kinds of labor in the field, all their labors which they rigorously imposed on them.

Now it came about in those days, when Moses had grown up, that he went out to his brethren and looked on their hard labors; and he saw an Egyptian beating a Hebrew, one of his brethren.