'Hard' in the Bible

And the children are hard and stiff-hearted; I am sending you to them: and you are to say to them, These are the words of the Lord.

For you are not sent to a people whose talk is strange and whose language is hard, but to the children of Israel;

Not to a number of peoples whose talk is strange and whose language is hard and whose words are not clear to you. Truly, if I sent you to them they would give ear to you.

But the children of Israel will not give ear to you; for they have no mind to give ear to me: for all the children of Israel have a hard brow and a stiff heart.

See, I have made your face hard against their faces, and your brow hard against their brows.

The people of the land have been acting cruelly, taking men's goods by force; they have been hard on the poor and those in need, and have done wrong to the man from a strange land.

Son of man, Nebuchadrezzar, king of Babylon, made his army do hard work against Tyre, and the hair came off every head and every arm was rubbed smooth: but he and his army got no payment out of Tyre for the hard work which he had done against it.

I have given him the land of Egypt as the reward for his hard work, because they were working for me, says the Lord.