[ UK /hˈɑːdnəs/ ]
[ US /ˈhɑɹdnəs/ ]
NOUN
  1. excessive sternness
    the rigors of boot camp
    severity of character
    the harshness of his punishment was inhuman
  2. a quality of water that contains dissolved mineral salts that prevent soap from lathering
    the costs of reducing hardness depend on the relative amounts of calcium and magnesium compounds that are present
  3. the quality of being difficult to do
    he assigned a series of problems of increasing hardness
    the ruggedness of his exams caused half the class to fail
  4. the property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale
  5. devoid of passion or feeling; hardheartedness
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How To Use hardness In A Sentence

  • There is probably room for a touch more earthiness, a little more hardness in her approach to a Don José who is always going to be putty in her hands.
  • We decided to only soften the water that would be heated, since there were no other quality issues with hardness in the cold tap water.
  • We can ourselves bear witness to the "hardness of the pavement" below, which Captain Wentworth feared would cause "too great a jar" when he urged the young lady to desist from the fatal leap. Jane Austen: Her Homes and Her Friends
  • In order to improve product craft, pandora denounce is gigantic endowment from Italy introduced the first set of gold in Asia electroforming machine equipment, the advanced production cheap pandora equipment, the pandora gold beads electroforming furnishing articles products on the market now, can solve the defect that furnishing articles hardness, surface hardness than traditional products increased more than three times. VInvesting.com
  • All the precious stones, except moonstone, opal and sphene, have at least the hardness of quartz, and can barely be scratched by metals, even by hard steel. Scientific American Supplement, No. 1082, September 26, 1896
  • _quebrahacha_, or "axe-breaker," so named from the hardness of its wood. Gaspar the Gaucho A Story of the Gran Chaco
  • The colliquation of his spirits: My heart is like wax, melted to receive the impressions of God's wrath against the sins he undertook to satisfy for, melting away like the vitals of a dying man; and, as this satisfied for the hardness of our hearts, so the consideration of it should help to soften them. Commentary on the Whole Bible Volume III (Job to Song of Solomon)
  • Solids, liquids and gases are ideal behaviours characterised by properties such as compressibility, viscosity, elasticity, strength and hardness. Archive 2005-09-01
  • The difference of water properties lies not only in their softness or hardness.
  • The surface hardness of rubber object mounted on the equipment can also be tested by holding the head of the sclerometer in hand.
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