'Hard' in the Bible

And the young man that told him said, As I happened by chance upon mount Gilboa, behold, Saul was leaning upon his spear; and, lo, the chariots and the horsemen followed hard after him.

And I am this day weak, though anointed king; and these men the sons of Zeruiah are too hard for me: Jehovah reward the evil-doer according to his wickedness.

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