1. hardiness(n = noun.attribute) lustiness, robustness, validity - the property of being strong and healthy in constitution;
is a kind of strength
Derived form adjective hardy1
2. hardiness(n = noun.attribute) boldness, daring, hardihood - the trait of being willing to undertake things that involve risk or danger; "the proposal required great boldness"; "the plan required great hardiness of heart"
is a kind of fearlessness
has particulars: adventurousness, venturesomeness, daredevilry, daredeviltry, audaciousness, audacity, temerity, brazenness, shamelessness
1. Capability of endurance. [1913 Webster]
2. Hardihood; boldness; firmness; assurance. Spenser. [1913 Webster]
"Plenty and peace breeds cowards; Hardness ever
Of hardiness is mother." [1913 Webster]
"They who were not yet grown to the hardiness of avowing the contempt of the king." [1913 Webster]
3. Hardship; fatigue. Spenser. [1913 Webster]