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Meaning of HARDNESS

Pronunciation:  'hârdnis

WordNet Dictionary
  1. [n]  excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp"
  2. [n]  the quality of being difficult to do; "he assigned a series of problems of increasing hardness"
  3. [n]  devoid of passion or feeling
  4. [n]  the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale

HARDNESS is a 8 letter word that starts with H.


 Synonyms: callousness, harshness, inclemency, insensibility, rigor, rigour, severity, stiffness, unfeelingness
 Antonyms: softness
 See Also: body, consistence, consistency, difficultness, difficulty, firmness, incompressibility, insensitiveness, insensitivity, sternness, strictness



Webster's 1913 Dictionary
\Hard"ness\, n. [AS. heardness.]
1. The quality or state of being hard, literally or

         The habit of authority also had given his manners
         some peremptory hardness.             --Sir W.

2. (Min.) The cohesion of the particles on the surface of a
   body, determined by its capacity to scratch another, or be
   itself scratched;-measured among minerals on a scale of
   which diamond and talc form the extremes.

3. (Chem.) The peculiar quality exhibited by water which has
   mineral salts dissolved in it. Such water forms an
   insoluble compound with soap, and is hence unfit for
   washing purposes.

Note: This quality is caused by the presence of calcium
      carbonate, causing temporary hardness which can be
      removed by boiling, or by calcium sulphate, causing
      permanent hardness which can not be so removed, but may
      be improved by the addition of sodium carbonate.

Biology Dictionary
  1. Total concentration of calcium and magnesium ions, expressed as the equivalent concentration (mg/L) of calcium carbonate. "Hard" water is water that contains lots of calcium carbonate and other minerals.
  2. In water, the total concentration of calcium and magnesium ions expressed as mg/l calcium carbonate.
Thesaurus Terms
 Related Terms: abstruseness, arduousness, armor, asperity, astringency, austerity, bothersomeness, burdensomeness, callosity, callousness, callus, closeness, cohesiveness, coldbloodedness, coldheartedness, coldness, compactness, complexity, complication, congestedness, congestion, consistence, consistency, crabbedness, crampedness, crowdedness, cruelty, deepness, denseness, density, difficultness, difficulty, durability, esoterica, firmness, flintiness, formidable defenses, fundamentalism, gluiness, grimness, hairiness, hard heart, hard shell, hardenedness, hardheartedness, hardiness, hardness of heart, hardship, harshness, heart of stone, heartlessness, impenetrability, impenitence, impenitentness, impermeability, imperviousness, impliability, imporosity, inclemency, incompressibility, induration, inexorability, inexorableness, inflexibility, infrangibility, insensitiveness, insensitivity, insolence, intricacy, inuredness, irrepentance, jammedness, knottiness, laboriousness, lastingness, leatherlikeness, mercilessness, nonrepentance, obduracy, obdurateness, obstinacy, onerousness, oppressiveness, orthodoxy, Philistinism, pitilessness, precisianism, profoundness, profundity, purism, puritanism, reconditeness, relative density, relentlessness, remorselessness, resistance, rhinoceros hide, rigidity, rigidness, rigor, rigorousness, ropiness, roughness, ruggedness, ruthlessness, seared conscience, severity, short shrift, solidity, solidness, soundness, specific gravity, spissitude, stability, stamina, staunchness, sternness, stiffness, stoniness, stoutness, strength, strenuousness, stringency, stringiness, stubbornness, sturdiness, temper, tenacity, tender mercies, thick skin, thickness, toilsomeness, toughness, troublesomeness, unabjectness, unbendingness, unbreakability, unbreakableness, uncompassionateness, uncompromisingness, uncontriteness, unfeeling, unfeelingness, unforgivingness, ungentleness, unmercifulness, unnaturalness, unrelentingness, unremorsefulness, unresponsiveness, unsympatheticness, unyieldingness, vicissitude, vigor, viscidity, viscosity, viscousness, vitality