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From Old English unwīsdōm, corresponding to un- +‎ wisdom.


unwisdom (countable and uncountable, plural unwisdoms)

  1. Lack of wisdom; unwise conduct or action [from 9th c.]
    Synonyms: ignorance, stupidity
    • J. A. Froude
      Sumptuary laws are among the exploded fallacies which we have outgrown, and we smile at the unwisdom which could except to regulate private habits and manners by statute.
    • 2010, Christopher Hitchens, Hitch-22, Atlantic 2011, p. 151:
      Reporting from Vietnam in 1945, he may have been the first person to assert the extreme unwisdom of trying to restore French colonialism with British troops.