'Dull' in the Bible

Leah’s eyes were weak, but Rachel was beautiful in form and appearance.

then the priest shall look, and if the bright spots on the skin of their bodies is a dull white, it is [only] a rash that has broken out on the skin; he is clean.

Their heart is insensitive like fat [their minds are dull and brutal],But I delight in Your law.

If the axe is dull and he does not sharpen its edge, then he must exert more strength; but wisdom [to sharpen the axe] helps him succeed [with less effort].

Behold, the Lord’s hand is not so shortThat it cannot save,Nor His ear so impairedThat it cannot hear.

‘Thus says the Lord, the God of Israel, “Behold, I will turn back and dull the edge of the weapons of war that are in your hands, [those] with which you fight against the king of Babylon and the Chaldeans who are besieging you outside the walls; and I will bring them into the center of this city (Jerusalem).

But they refused to listen and pay attention and turned a stubborn shoulder [stiffening themselves in resistance] and stopped up their ears.