be foolish
Moraino describes being made or becoming foolish, and in salt comparisons a loss of its useful character.
The human examples describe God making the world's wisdom foolish and people becoming fools while claiming wisdom; the salt comparisons use the term for a condition in which salt no longer has its former usefulness.
Senses in use
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Made or becoming foolish · dominant
In 1 Corinthians 1:20, the aorist active singular form occurs in the question whether God has made the wisdom of the world foolish. In Romans 1:22, the aorist passive plural form describes people who claim wisdom and become fools.
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Salt losing its useful quality · common
The aorist passive subjunctive form appears in conditional statements about salt in Matthew 5:13 and Luke 14:34. In Matthew 5:13 the APB renders the condition “the salt becomes foolish” and says it has no strength any longer; in Luke 14:34 it renders the same condition as salt becoming “tasteless.”
In the Anselm Project Bible: The APB renders the human contexts with “foolish” and “fools.” In the salt contexts it varies between “becomes foolish” and “becomes tasteless”; This variation should not by itself define separate meanings.