to declare: to state out loud for someone else what they have no way of finding out on their own, above all a dream, its meaning, or a hidden matter.
Almost every time this verb appears, someone is being pressed to produce what they have no ordinary way of knowing. What gets declared in the book of Daniel is always out of human reach:
- the dream the king refuses to describe to his experts
- the meaning of that dream once it has been told
- the mystery that stands behind the dream
- the writing that appears on the wall at Belshazzar's feast
So the word belongs to the throne room. It is the verb of the king's demand and of the answer promised back to him, used both by the experts who cannot deliver and by Daniel who can. That contrast drives the whole of Daniel 2: no one on earth can declare what the king is asking, and the God of heaven does.
It sits close to the ordinary Aramaic verb for making something known, יְדַע, and the two stand side by side in a single demand: the king orders his experts to make the dream known to him, and in the same breath insists that they declare what it means. Where the two pull apart, this word points at the hidden content being said out loud, while its neighbor points at the hearer coming to know it.
One use stands apart from the rest. In Daniel 4:2 the king is not answering anyone. He is sending an open letter to every nation, telling them what God has done to him. There the word is closer to making a public announcement than to giving up a secret.