The proud and arrogant person—“Mocker” is his name— behaves with insolent fury.
Read Proverbs 21:24 Using Other Translations
Proud and haughty scorner is his name, who dealeth in proud wrath.
"Scoffer" is the name of the arrogant, haughty man who acts with arrogant pride.
Mockers are proud and haughty; they act with boundless arrogance.
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(New International Version Bible Online)