'Able' in the Bible

Then they said to him, "Look, there are with your servants fifty able men. Please let them go and look for your master, lest the Spirit of Yahweh has lifted him up and thrown him on one of the mountains or into one of the valleys," but he said, "You must not send them."

When the king of Moab saw that the battle was too heavy for him, he took with him seven hundred men who drew the sword to break through to the king of Edom, but they were not able.

They served the men to eat, but when they ate from the stew, they cried out and said, "There [is] death in the pot, man of God!" They were not able to eat [it].

Then Rezin the king of Aram went up [with] Pekah the son of Remaliah king of Israel against Jerusalem for battle, and they besieged Ahaz but were not able to {defeat} him.

So then, please make a wager with my lord, with the king of Assyria, and I will give to you a thousand horses {if you are able on your part to put riders on them.}

Thus says the king, 'Do not let Hezekiah deceive you, for he will not be able to rescue you from my hand.