Last Updated
：2025/12/03
dumb as a doornail
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(simile) irrefutably or unquestionably dumb
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dumb as a doornail
His plan was so ill-conceived and he defended it so stubbornly that everyone agreed he was dumb as a doornail.
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His plan was so ill-conceived and he defended it so stubbornly that everyone agreed he was dumb as a doornail.
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