'Unable' in the Bible

Just as they were going out, a demon-possessed man who was unable to speak was brought to Him.

Then a demon-possessed man who was blind and unable to speak was brought to Him. He healed him, so that the man could both speak and see.

and large crowds came to Him, having with them the lame, the blind, the deformed, those unable to speak, and many others. They put them at His feet, and He healed them.

So the crowd was amazed when they saw those unable to speak talking, the deformed restored, the lame walking, and the blind seeing. And they gave glory to the God of Israel.