'Deathly' in the Bible

In those days Hezekiah became {deathly ill}, and Isaiah the son of Amoz the prophet came to him and said to him, "Thus says Yahweh, 'Command your house, for you [are about] to die; you will not recover.'"

My heart trembles within me, and deathly terrors fall on me.

And I myself, Daniel, alone saw this great vision, and [as a result] {no strength was left in me} and {my complexion grew deathly pale}, and I did not retain any strength.