'Strong' in the Bible

And they said, Your servants have with us here fifty strong men; be pleased to let them go in search of Elijah; for it may be that the spirit of the Lord has taken him up and put him down on some mountain or in some valley. But he said, Do not send them.

And Hazael said, Why is my lord weeping? Then he said in answer, Because I see the evil which you will do to the children of Israel: burning down their strong towns, putting their young men to death with the sword, smashing their little ones against the stones, and cutting open the women who are with child.

Now when he became strong in the kingdom, straight away he put to death those servants who had taken the life of the king his father;

Then the king of Assyria sent the Tartan and the Rab-saris and the Rab-shakeh from Lachish to Jerusalem, to King Hezekiah, with a strong force. And they went up and came to Jerusalem, and took up their position by the stream of the higher pool, by the highway of the washerman's field.

Has it not come to your ears how I did it long before, purposing it in times long past? Now I have given effect to my design, so that by you strong towns might be turned into masses of broken walls.

And all the men of war, seven thousand of them, and a thousand expert workmen and metal-workers, all of them strong and able to take up arms, the king of Babylon took away as prisoners into Babylon.