Word Study
unwisdom
CIDE DICTIONARY
unwisdom, n.
Want of wisdom; unwise conduct or action; folly; simplicity; ignorance. [1913 Webster]
"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." [1913 Webster]
OXFORD DICTIONARY
unwisdom, n. lack of wisdom, folly, imprudence.
Etymology
OE unwisdom (as UN-(1), WISDOM)
For further exploring for "unwisdom" in Webster Dictionary Online