hardiness

noun4

1. •
   The quality of being hardy.
2. •
   The quality of being able to withstand fatigue and hardship; (of a plant) the quality of being resistant to cold or other environmental conditions.

   • Kale is known for its winter-hardiness.
3. •
   (no longer used) The quality of being bold in the face of risk or authority.

   • Plentie, and Peace breeds Cowards: Hardnesse euer / Of Hardinesse is Mother. — 1611
4. •
   (no longer used) Hardship; fatigue.

   • Yet sure they are very valiant, and hardy, for the most part great Indurers of Cold, Labour, Hunger, and all Hardiness […] — 1596