'Hard' in the Bible

And there was hard fighting that day; and Abner and the men of Israel gave way before the servants of David.

And he was so deeply in love that he became ill because of his sister Tamar; for she was a virgin, and so it seemed hard to Amnon to do anything to her.

He who is holy will see that you are holy; but to the man whose way is not straight you will be a hard judge.

And David said to Gad, This is a hard decision for me to make: let us come into the hands of the Lord, for great are his mercies: let me not come into the hands of men.