'Understanding' in the Bible

Prostitution, wine, and new wine take away understanding.

I will not punish your daughters when they play the prostitute, nor your brides when they commit adultery; because the men consort with prostitutes, and they sacrifice with the shrine prostitutes; so the people without understanding will come to ruin.

"Ephraim is like an easily deceived dove, without understanding. They call to Egypt. They go to Assyria.

Now they sin more and more, and have made themselves molten images of their silver, even idols according to their own understanding, all of them the work of the craftsmen. They say of them, 'They offer human sacrifice and kiss the calves.'