hardy

adjectives

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"
is derived from
able to survive under unfavorable weather conditions
"strawberries are hardy and easy to grow"; "camels are tough and hardy creatures"
is similar to
sturdy and strong in form, constitution, or construction
"a robust body"; "a robust perennial"
invulnerable to fear or intimidation
"audacious explorers"; "fearless reporters and photographers"; "intrepid pioneers"