'Understands' in the Bible

may the wise hear and increase learning, and the one who understands gain direction,

Everything I say is sensible to someone who understands, and correct to those who have acquired knowledge.

A mocker seeks wisdom and finds none, but learning comes easily to someone who understands.

The heart of him who understands will seek knowledge, but the faces of fools, they will feed on folly.

The one who understands a matter finds success,and the one who trusts in the Lord will be happy.

A rebuke strikes him who understands deeper than one hundred blows to a fool.

He who understands sets [his] face [toward] wisdom, but the eyes of a fool, to the end of the earth.

Evil men don't understand justice, but whoever seeks the LORD understands it all.

A slave cannot be disciplined by words;though he understands, he doesn’t respond.