hardihood

noun3

1. •
   Unyielding boldness and daring; firmness in doing something that exposes one to difficulty, danger, or calamity; intrepidness.

   • Once endured it is enjoyed as my owndom. Elsewhere I refer to this process of enduring hardship as the only possible source of hardihood. — 1971
2. •
   Excessive boldness; foolish daring; offensive assurance.

   • I have not the hardihood to dare to be vilely dishonest. — 1798
3. •
   Of a plant, an ability to withstand extreme conditions, hardiness.

   • The cheapness and hardihood of the musk-plant and marigold, to say nothing of their peculiar odour, has made them the most popular of “roots” […] — 1851