'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.

Ask yourselves this and consider it carefully: Have you ever seen a man give birth to a baby? Why then do I see all these strong men grabbing their stomachs in pain like a woman giving birth? And why do their faces turn so deathly pale?

I was left alone, looking at this great vision. No strength was left in me; my face grew deathly pale, and I was powerless.