'Unable' in the Bible

When the magicians, astrologers, wise men, and diviners entered, I recounted the dream for them. But they were unable to make known its interpretation to me.

So all the king's wise men came in, but they were unable to read the writing or to make known its interpretation to the king.

Now the wise men and astrologers were brought before me to read this writing and make known to me its interpretation. But they were unable to disclose the interpretation of the message.

Consequently the supervisors and satraps were trying to find some pretext against Daniel in connection with administrative matters. But they were unable to find any such damaging evidence, because he was trustworthy and guilty of no negligence or corruption.

Then the king departed to his palace. But he spent the night without eating, and no diversions were brought to him. He was unable to sleep.

While he was saying this to me, I was flat on the ground and unable to speak.