Main entry: inflexible, sturdy, uncompromising
Definition: not making concessions
Usage: took an uncompromising stance in the peace talks; uncompromising honesty
Antonyms: flexible, compromising, conciliatory
Definition: making or willing to make concessions
Main entry: sturdy, tough
Definition: substantially made or constructed
Usage: sturdy steel shelves; sturdy canvas; a tough all-weather fabric; some plastics are as tough as metal
Antonyms: delicate
Definition: exquisitely fine and subtle and pleasing; susceptible to injury
Main entry: hardy, stalwart, stout, sturdy
Definition: having rugged physical strength; inured to fatigue or hardships
Usage: hardy explorers of northern Canada; proud of her tall stalwart son; stout seamen; sturdy young athletes
Antonyms: frail
Definition: physically weak