Hardihood definitions

här'dē-ho͝od'
Boldness and daring.
noun
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Impudence or insolence.
noun
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Boldness, daring, fortitude, vigor, etc.
noun
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Unyielding boldness and daring; firmness in doing something that exposes one to difficulty, danger, or calumnity; intrepidness.
noun
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Excessive boldness; foolish daring; offensive assurance.
noun
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Origin of hardihood

From hardy +‎ -hood. Compare Dutch hardigheid (“hardness, callousness”), German Hartigkeit (“hardness”).