very hard native crystalline carbon valued as a gem
impervious to pleas, persuasion, requests, reason;
extremely explicit; "hard-core pornography"
intensely loyal; "his hard-core supporters"
incapable of or resistant to bending;
designating an airship or dirigible having a form maintained by a stiff unyielding frame or structure
incapable of adapting or changing to meet circumstances;
fixed and unmoving; "with eyes set in a fixed glassy stare";
incapable of compromise or flexibility
not to be placated or appeased or moved by entreaty; "grim determination"; "grim necessity"; "Russia's final hour, it seemed, approached with inexorable certainty"; "relentless persecution"; "the stern demands of parenthood"
United States concert violinist (born in Russia in 1920)
severe and unremitting in making demands; "an exacting instructor"; "a stern disciplinarian"; "strict standards"
the rear part of a ship
of a stern or strict bearing or demeanor; forbidding in aspect; "an austere expression"; "a stern face"
the fleshy part of the human body that you sit on; "he deserves a good kick in the butt"; "are you going to sit on your fanny and do nothing?"
substantially made or constructed; "sturdy steel shelves"; "sturdy canvas"; "a tough all-weather fabric"; "some plastics are as tough as metal"
not making concessions; "took an uncompromising stance in the peace talks"; "uncompromising honesty"
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"