'Able' in the Bible

When he came out, he was not able to speak to them. They realized that he had seen a vision in the holy place, because he was making signs to them and remained unable to speak.

"Exert every effort to enter through the narrow door, because many, I tell you, will try to enter and will not be able to.

Otherwise, when he has laid a foundation and is not able to finish the tower, all who see it will begin to make fun of him.

They will say, 'This man began to build and was not able to finish!'

Or what king, going out to confront another king in battle, will not sit down first and determine whether he is able with ten thousand to oppose the one coming against him with twenty thousand?

For I will give you the words along with the wisdom that none of your adversaries will be able to withstand or contradict.