sturdy

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"

hardy, stalwart, stout, sturdy

is derived from

not making concessions

"took an uncompromising stance in the peace talks"; "uncompromising honesty"

is derived from

substantially made or constructed

"sturdy steel shelves"; "sturdy canvas"; "a tough all-weather fabric"; "some plastics are as tough as metal"

sturdy, tough

is derived from