hard as nails

ferocious vicious

savage

barbarous bloodthirsty cruel dog-eat-dog merciless pitiless relentless unprincipled

gentle kind

decisive dogged purposeful resolute resolved serious single-minded steadfast strong-willed stubborn tenacious

bent decided firm fixed obstinate pat persevering set settled

bent on buckled down constant earnest hardboiled intent mean business on ice set on solid strong-minded unfaltering unflinching unhesitating unwavering

irresolute undetermined weak yielding

changeable flexible indefinite soft undecided unfixed

hesitating vacillating wavering

bleak grim harsh painful tough

acrimonious angry antagonistic austere bitter brutal callous cold cold fish cold-blooded dark disagreeable distressing dour exacting grievous hard-boiled hostile inclement intemperate intolerable obdurate perverse pitiless rancorous resentful rigorous rugged severe stern strict stringent stubborn thick-skinned unfeeling unjust unkind unpleasant unrelenting unsparing unsympathetic vengeful

cheerful easygoing gentle kind nice pleasant

flexible merciful mild pliable sensitive soft sympathetic

adamantine callous compact compacted compressed concentrated consolidated dense firm hard-handed hardened hardy impenetrable indurate indurated inflexible iron packed rigid rocky rugged set solid stiff stony strong

hard-nosed

callous firm hard-line hard-shelled headstrong inflexible obdurate obstinate rough stern strict unbending unfeeling

coldhearted seasoned

accustomed benumbed callous habituated indurated inured prepared steeled toughened unbending

case-hardened contemptuous cruel disdainful hard-bitten hard-boiled hardhearted heartless impenetrable impious inaccessible irreverent obdurate obtuse resistant unashamed uncaring uncompassionate unemotional unrepenting unsubmissive

compassionate feeling kind nice sympathetic

brutal callous cold-blooded cruel harsh inhuman insensitive merciless ruthless uncaring unkind

cold fish cold-hearted hard hard-boiled hard-hearted obdurate pitiless savage thick-skinned uncompassionate unemotional unfeeling unsympathetic

compassionate considerate feeling friendly gentle giving kind merciful nice sensitive sympathetic

caring warmhearted

assured complacent composed cool cool as cucumber disimpassioned equanimous immovable nerveless nonchalant roll with punches sedate self-possessed self-satisfied stiff upper lip stoical thick-skinned tranquil unaffected undisturbed unexcitable unflappable unmoved unruffled untouched

excitable irritable jittery perturbable touchy

crass heartless uncaring unkind unresponsive

aloof bloodless coldhearted feelingless hard hard-boiled hardened hardhearted imperceptive incurious obtuse stony tactless thick-skinned tough unconcerned unfeeling unsusceptible

considerate kind nice

aware caring concerned feeling impressionable mindful responsive sensate sensitive touched

unsusceptible

aloof bloodless coldhearted crass feelingless hard hard-boiled hardened hardhearted heartless impassible impassive imperceptive incurious obtuse stony tactless thick-skinned tough uncaring unconcerned unfeeling unimpressionable unkind unresponsive

able able-bodied active athletic big capable durable enduring energetic firm fixed forceful forcible hale hardy hearty heavy heavy-duty in fine feather mighty muscular potent powerful reinforced robust rugged secure sinewy solid sound stable stalwart stark staunch steady stout strapping sturdy substantial tenacious tough unyielding vigorous well-built well-founded well-made

forceful mighty powerful

athletic hale hardy muscular robust rugged sinewy stalwart strapping vigorous well-built

built burly healthy hearty stout tough unyielding

enervated feeble fragile impotent infirm powerless vulnerable weak

delicate

anemic bedridden soft wobbly

benumbed callous coldhearted hardhearted insensitive seasoned tough toughened unbending unfeeling

hard healthy resilient solid stiff tenacious tight vigorous

firm fit hardy stalwart stout

brawny cohesive conditioned dense durable fibrous flinty hard-bitten hardened indigestible inflexible leathery lusty mighty molded resistant rigid robust rugged seasoned sinewy steeled strapping tough as nails unbreakable unyielding withstanding

slack soft weak

delicate fragile unstable vulnerable wobbly

crisp firm obstinate reserved

aloof distant do-or-die dug in formal hard-line hold one's ground hold the fort hold the line incompliant inelastic inexorable inflexible intractable locked-in obdurate relentless resolute set in stone severe single-minded standing one's ground standing pat sticking to one's guns stiff strict stubborn uncompromising unflexible unrelenting unswayable unyielding uptight

flexible soft yielding

bending pliable pliant relaxed

endurance grit persistence stamina staying power

backbone constancy guts gutsiness heart imperishability lastingness moxie permanence starch

durableness intestinal fortitude

weakness

cowardice fear

impermanency poorness unreliability