'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:

Without understanding, covenantbreakers, without natural affection, implacable, unmerciful:

There is none who is understanding, there is none who is seeking after God.

but I discover within me a different Law at war with the Law of my understanding, and leading me captive to the Law which is everywhere at work in my body--the Law of sin.

But I ask, “Did Israel not understand?” First, Moses said:I will make you jealousof those who are not a nation;I will make you angry by a nationthat lacks understanding.