hardy in WordNet English dictionary

1. invulnerable to fear or intimidation
   "audacious explorers"; "fearless reporters and photographers"; "intrepid pioneers"
   audacious  brave  dauntless  fearless  hardy  intrepid  unfearing 
   
2. having rugged physical strength; inured to fatigue or hardships
   "hardy explorers of northern Canada"; "proud of her tall stalwart son"; "stout seamen"; "sturdy young athletes"
   hardy  stalwart  stout  sturdy 
   
3. able to survive under unfavorable weather conditions
   "strawberries are hardy and easy to grow"; "camels are tough and hardy creatures"
   hardy