'Unable' in the Bible

Now [as] they were going away, behold, they brought to him a demon-possessed man [who was] unable to speak.

And [when he] came out he was not able to speak to them, and they realized that he had seen a vision in the temple. And he kept making signs to them, and remained unable to speak.

And he was {unable to see} [for] three days, and he did not eat or drink.