'Knew' in the Bible

Then the eyes of both of them opened, and they knew they were naked; so they sewed fig leaves together and made coverings for themselves.

When the dove returned to him in the evening, there was a freshly plucked olive leaf in its beak! Noah knew that the waters had receded from the earth.

But Onan knew that the child would not be considered his. So whenever he had sexual relations with his brother's wife, he withdrew prematurely so as not to give his brother a descendant.