strongly built; stalwart; robust

sturdy young athletes.

strong, as in substance, construction, or texture

sturdy walls.

firm; courageous; indomitable

the sturdy defenders of the Alamo.

of strong or hardy growth, as a plant.

adjective

unstable , weak , wobbly

adjective

athletic , built to last , bulky , determined , firm , flourishing , hardy , hearty , hefty , hulking , husky , lusty , muscular , powerful , powerhouse , resolute , robust , rugged , secure , sound , stalwart , staunch , steadfast , stiff , stout , stouthearted , strapping , strong , strong-arm * , substantial , tenacious , tough , unyielding , vigorous , well-built , well-made , brawny , burly , sinewy , solid , stable , sure , unshakable , able-bodied , iron , red-blooded , vital , courageous , durable , hale , healthy , obdurate , obstinate , pertinacious , pyknic , roborant , steady , stubborn , yeomanly