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hardness    音標拼音: [h'ɑrdnəs]
n. 堅硬,困難,嚴厲,勇氣

堅硬,困難,嚴厲,勇氣

hardness
n 1: the property of being rigid and resistant to pressure; not
easily scratched; measured on Mohs scale [ant: {softness}]
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: devoid of passion or feeling; hardheartedness [synonym:
{unfeelingness}, {callousness}, {callosity}, {hardness},
{insensibility}]
4: 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" [synonym: {hardness},
{ruggedness}]
5: excessive sternness; "severity of character"; "the harshness
of his punishment was inhuman"; "the rigors of boot camp"
[synonym: {severity}, {severeness}, {harshness}, {rigor},
{rigour}, {rigorousness}, {rigourousness}, {inclemency},
{hardness}, {stiffness}]

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

The habit of authority also had given his manners
some peremptory hardness. --Sir W.
Scott.
[1913 Webster]

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.
[1913 Webster]

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.
[1913 Webster]

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.
[1913 Webster]

158 Moby Thesaurus words for "hardness":
Philistinism, 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,
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

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英文字典中文字典相關資料:
  • Hardness - Wikipedia
    In materials science, hardness (antonym: softness) is a measure of the resistance to localized plastic deformation, such as an indentation (over an area) or a scratch (linear), induced mechanically either by pressing or abrasion
  • What Is Hardness of a Material? Types Testing Methods
    Hardness measures a material’s resistance to deformation Learn how Mohs, Brinell, Vickers, and Rockwell scales work and when hardness actually matters
  • What is Hardness – Definition - Material Properties
    In materials science, hardness is the ability to withstand surface indentation (localized plastic deformation) and scratching
  • Janka Hardness - Bell Forest Products
    Janka Hardness The Janka scale is used to determine the relative hardness of particular domestic or exotic wood species The Janka test measures the amount of force required to embed a 0 444" steel ball into the wood to half of its diameter Woods with a higher rating are harder than woods with a lower rating
  • Hardness – EngineeringTechnology. org
    Hardness is closely related to wear resistance, making it an important property in cutting tools, bearings, and surface coatings Heat treatment and cold working can significantly increase hardness in metals by modifying their microstructure, making them more resistant to deformation
  • Hardness of Materials: A Comprehensive Overview for Engineers . . .
    Material hardness refers to a material’s ability to resist deformation, scratching, or indentation This guide explores how hardness is measured, the different testing scales used, and why understanding hardness is essential in selecting materials for engineering and manufacturing applications
  • Hardness of Metals Explained | HV, HB, HRC Hardness Conversion
    Learn about metal hardness testing methods and scales, including Brinell (HB), Rockwell (HR), Vickers (HV), and Leeb (HL), with conversion references
  • Material Hardness - from Types of Hardness to Testing Units
    Hardness is a material’s quality to withstand localised deformation It may be especially important when looking for a suitable material for an environment that includes little particles that can induce material wear
  • Understanding Material Hardness: Types, Testing, and Applications
    This article explores the hardness of a material in detail, along with a couple of hardness testing methods, their applications, and how to choose the right material hardness test according to your requirements
  • Understanding Hardness: The Science behind Material Strength
    What is hardness? Hardness can be defined as a material’s resistance to localized plastic deformation, which often manifests as indentation, scratching or abrasion This property is crucial because it determines how well a material can maintain its shape and resist wear over time





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