'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.

This dream I, King Nebuchadnezzar, saw; and do you, O Belteshazzar, make clear the sense of it, for all the wise men of my kingdom are unable to make the sense of it clear to me; but you are able, for the spirit of the holy gods is in you.

Then all the king's advisors came in, but they were unable to read the writing or tell the king what it meant.

Take note that the advisors and enchanters were brought before me to read the writing and explain its meaning, but they were unable to do so.

Because of this, the administrators and regional authorities tried to bring allegations of dereliction of duty in government affairs against Daniel, but they were unable to find any charges of corruption. Daniel was trustworthy, and no evidence of negligence or corruption could be found against him.

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.

"After he had spoken to me like this, I bowed my face to the ground, unable to speak.