ke.sil describes a person marked by rejection of knowledge, unrestrained speech, and conduct set against wisdom.

The term consistently identifies a person whose conduct is set against wisdom: such people hate knowledge, resist correction, speak and act destructively, and bring grief or dishonor. The singular and plural forms occur in contrasts with the wise, discerning, or prudent person rather than showing distinct lexical uses.

1. Person characterized by unwise conduct · dominant

   The masculine singular and plural absolute forms identify people contrasted with wisdom or understanding. In Proverbs 1:22 the APB renders fools as hating knowledge; in Proverbs 17:16 it renders a person with money to buy wisdom but no sense, while Proverbs 18:6 depicts the person's lips entering strife and Proverbs 10:23 depicts wrongdoing as laughter.

   Proverbs 1:22Proverbs 10:23Proverbs 17:16Proverbs 18:6Ecclesiastes 10:12Ecclesiastes 7:9

In the Anselm Project Bible: The APB usually presents the term with “fool” or “fools,” and sometimes uses “foolish” in a related clause. These renderings confirm the verses' portrayal of the person without fixing a separate English equivalent in every clause.