Definitions
1.noun(usually in the plural) Anything, especially a plant, that is hardy.
2.nounA blacksmith's fuller or chisel, having a square shank for insertion into a square hole in an anvil, called the hardy hole.
3.adjectiveHaving rugged physical strength; inured to fatigue or hardships.
4.adjectiveAble to survive adverse growing conditions."A hardy plant is one that can withstand the extremes of climate, such as frost."
5.adjectiveBrave and resolute.
6.adjectiveImpudent.