'Hard' in the Bible

Woe is me, for my wound! My stroke is hard to heal, and I had said, Yea, this is my grief, and I will bear it.

Alas, Lord Jehovah! Behold, thou hast made the heavens and the earth by thy great power and stretched-out arm; there is nothing too hard for thee:

Behold, I am Jehovah, the God of all flesh: is there anything too hard for me?

then it shall come to pass, that the sword which ye fear shall overtake you there in the land of Egypt, and the famine, whereof ye are afraid, shall follow hard after you there in Egypt; and there ye shall die.

Let not the swift flee away, neither let the mighty man escape! Toward the north, hard by the river Euphrates, they have stumbled and fallen.