hardest
Least easily done
Hardest is the superlative of hard—the most difficult, the most solid, or the most intense.
What's hardest depends on context: the hardest substance, the hardest question on the exam, the hardest hit of the game.
That was the hardest thing I've ever done.
Crystallized carbon gemstone
- tungstenElement seventy-four
- corundumCrystalline aluminum oxide
- carbideCarbon-bonded metal compound
- sapphireBlue precious corundum
ruby · boron · topaz · granite · basalt · obsidian · quartz · ceramic
Impossible to overcome
- impossibleIncapable of occurring
- arduousDemanding strenuous effort
- gruelingExtremely tiring and demanding
- dauntingDiscouraging through difficulty
formidable · Herculean · Sisyphean · overwhelming · taxing · laborious · onerous · exhausting
Impossible to damage permanently
- unbreakableImpossible to damage
- impenetrableImpossible to pass through
- reinforcedMade more resistant
- fortifiedMade more resistant
armored · toughened · resistant · solid · rigid · unyielding · sturdy · robust
Long-distance footrace
- ultramarathonRace longer than 26.2 miles
- triathlonThree-event endurance contest
- ironmanLong-distance triathlon competitor
- staminaCapacity for sustained effort
perseverance · persistence · fortitude · tenacity · grit · determination · grueling · survival
diamond
Crystallized carbon gemstone
sapphire · ruby · boron · topaz · granite · basalt · obsidian · quartz · ceramic · steel
insurmountable
Impossible to overcome
- impossibleIncapable of occurring
- arduousDemanding strenuous effort
- gruelingExtremely tiring and demanding
daunting · formidable · Herculean · Sisyphean · overwhelming · taxing · laborious · onerous · exhausting · punishing
indestructible
Impossible to damage permanently
- unbreakableImpossible to damage
- impenetrableImpossible to pass through
- reinforcedMade more resistant
fortified · armored · toughened · resistant · solid · rigid · unyielding · sturdy · robust · durable
marathon
Long-distance footrace
- ultramarathonRace longer than 26.2 miles
- triathlonThree-event endurance contest
- ironmanLong-distance triathlon competitor
stamina · perseverance · persistence · fortitude · tenacity · grit · determination · grueling · survival · tirelessness
puzzle
Challenge testing ingenuity
- conundrumPerplexing problem or question
- enigmaSomething hard to fathom
- riddlePuzzling question to solve
obstacle · dilemma · problem · test · trial · brain-teaser · stumper · head-scratcher · quandary · complexity
hardestsoftest
Most yielding to touch
squishiest · mushiest · spongiest · fluffiest · downiest
hardesteasiest
Least difficult option
simplest · breeziest · cushiest · child's play · piece of cake
hardestbendiest
Superlative of flexible
limpest · floppiest · rubberiest · springiest
- try harderExert greater effort
- hardened steelHeat-treated ferrous alloy
- hardest workingExerting maximum effort
- hardened heartEmotional numbness by choice
- hardened arteriesStiffened, plaque-clogged blood vessels
- hardened someone's heartMade emotionally impervious