סָכָל

Ecclesiastes 2:19 סָכָ֔ל a fool

And who knows whether that man will be wise or foolish? Yet he will take over all the labor at which I have worked skillfully under the sun. This too is futile.

Ecclesiastes 7:17 סָכָ֑ל a fool

Do not be excessively wicked, and do not be a fool. Why should you die before your time?

Ecclesiastes 10:3 כְּשֶׁסָּכָ֥ל סָכָ֥ל like when a fool, [is] a fool

Even as the fool walks along the road, his sense is lacking, and he shows everyone that he is a fool.

Ecclesiastes 10:14 וְהַסָּכָ֖ל and the fool

Yet the fool multiplies words. No one knows what is coming, and who can tell him what will come after him?

Jeremiah 4:22 סְכָלִים֙ fools

“For My people are fools; they have not known Me. They are foolish children, without understanding. They are skilled in doing evil, but they know not how to do good.”

Jeremiah 5:21 סָכָ֖ל fool

“Hear this, O foolish and senseless people, who have eyes but do not see, who have ears but do not hear.