Source : Webster's Revised Unabridged Dictionary (1913)

Unwisdom \Un*wis"dom\, n.
   Want of wisdom; unwise conduct or action; folly; simplicity;
   ignorance.

         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.                                 --J. A.
                                                  Froude.