'Hard' in the Bible

and make their lives bitter in hard service, in clay, and in brick, and in every kind of service in the field; all their service in which they have served is with rigour.

And Jehovah saith unto Moses, 'The heart of Pharaoh hath been hard, he hath refused to send the people away;

and Pharaoh sendeth, and lo, not even one of the cattle of Israel hath died, and the heart of Pharaoh is hard, and he hath not sent the people away.

And Jehovah saith unto Moses, 'Go in unto Pharaoh, for I have declared hard his heart, and the heart of his servants, so that I set these My signs in their midst,

and they have judged the people at all times; the hard matter they bring in unto Moses, and every small matter they judge themselves.