1. lack of wisdom; foolishness or poor judgment
Usage: formal; somewhat archaic

Examples

• The unwisdom of his decision became clear only later.
• She recognized the unwisdom of investing all her savings in one stock.
• The committee’s unwisdom in rushing the vote led to serious problems.
• His unwisdom in trusting strangers cost him dearly.
• The unwisdom of ignoring expert advice was soon apparent.
• They questioned the unwisdom of the new policy.