Webster's Revised Unabridged Dictionary · 1913

Hardihood

Hardihood (har"di*hod) , noun

[Hardy + -hood.]

Boldness, united with firmness and constancy of mind; bravery; intrepidity; also, audaciousness; impudence.
A bound of graceful hardihood. — Wordsworth
It is the society of numbers which gives hardihood to iniquity. — Buckminster