'Understanding' in the Bible

Because, knowing God, they glorified him not as God, neither were thankful; but fell into folly in their thoughts, and their heart without understanding was darkened:

void of understanding, faithless, without natural affection, unmerciful;

But I say, Has not Israel known? First, Moses says, I will provoke you to jealousy through them that are not a nation: through a nation without understanding I will anger you.