n. 无知, 愚昧, 愚蠢

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.