1. (

• hardy ,
• stalwart ,
• stout ,
• sturdy

) 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" ;

2. (

• uncompromising ,
• sturdy ,
• inflexible ,

) not making concessions; "took an uncompromising stance in the peace talks"; "uncompromising honesty" ;

3. (

• sturdy ,
• tough

) substantially made or constructed; "sturdy steel shelves"; "sturdy canvas"; "a tough all-weather fabric"; "some plastics are as tough as metal" ;