'Hard' in the Bible

The young man who told him said, "As I happened by chance on Mount Gilboa, behold, Saul was leaning on his spear; and behold, the chariots and the horsemen followed hard after him.

I am this day weak, though anointed king; and these men the sons of Zeruiah are too hard for me. May Yahweh reward the evildoer according to his wickedness."

Amnon was so troubled that he fell sick because of his sister Tamar; for she was a virgin; and it seemed hard to Amnon to do anything to her.