Hardness

What do we mean by hardness?

The quality or condition of being hard. noun

The relative resistance of a mineral to scratching, as measured by the Mohs scale. noun

The relative resistance of a metal or other material to denting, scratching, or bending. noun

Water, as found in nature, containing salts of lime or magnesia or both of these in considerable quantity, is said to be hard; it curdles or precipitates soap bv forming insoluble lime or magnesia salts of the fatty acids. Any lime or magnesia present in the condition of carbonate is held in solution by carbonic acid, and if this latter is driven off as carbon-dioxid gas by boiling the water, the earthy carbonates are precipitated, so that the water is to this extent softened. The part of the original hardness which is thus removable by boiling is called temporary hardness. The part due to calcium or magnesium in the condition of chlorid or sulphate is not thus removable, and is called permanent hardness. The sum of the temporary and permanent hardness constitutes the total hardness. Hardness is frequently stated in degrees, each degree representing hardness equivalent to that caused by 1 grain of calcium carbonate in 1 imperial gallon of water; or, now more commonly, 1 part of calcium carbonate in 1,000,000 parts of water. noun

The state or quality of being hard, in any of the senses of that word; solidity; density; difficulty of comprehension, accomplishment, control, or endurance; obduracy; harshness; severity; inclemency; adversity; roughness; uncomeliness; want of sensibility. noun

Specifically That quality in fountain-water which is imparted by the presence in excess of earthy salts, especially calcium sulphate. noun

In medicine, that quality of the pulse which is due to tension of the artery, which in this condition does not readily yield to the pressure of the finger. noun

In art and music, harshness or coldness of execution; unsympathetic treatment, as of a tone or the details of a picture; want of feeling in performance. noun

In mineralogy, the comparative capacity of a substance to scratch another or be scratched by another; the quality of bodies which enables them to resist abrasion of their surfaces. noun

The quality or state of being hard, literally or figuratively. noun

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. noun

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. noun

The quality of being hard. noun

An instance of this quality; hardship. noun

The property of being rigid and resistant to pressure; not easily scratched; measured on Mohs scale noun

Devoid of passion or feeling; hardheartedness noun

A quality of water that contains dissolved mineral salts that prevent soap from lathering noun

The quality of being difficult to do noun

Excessive sternness noun

The quality of being hard.

An instance of this quality; hardship.

The quantity of calcium carbonate dissolved in water, usually expressed in parts per million (ppm).

The resistance to scratching, cutting, indentation or abrasion of a metal or other solid material.

The penetrating ability of electromagnetic radiation, such as x-rays; generally, the shorter the wavelength, the harder and more penetrating the radiation.

The measure of resistance to damage of a facility, equipment, installation, or telecommunications infrastructure when subjected to attack.

Words that are spelled similarly to hardness:
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Words that are triggered by (strongly associated with) the word hardness:
indenter, conchoidal, brittleness, ductility, corundum, indentation, toughness, tempering, luster, softness, fluorite, talc, hardening, abrasion, vitreous, alkalinity, benthic, tensile, quenching, tester, gpa, cleavage, modulus, calcite, liter, brittle, astm, gravity, refractive, abrasive, scratched, conductivity, corrosion, carbonate, carbide, alloys, magnesium, machining, tungsten, elasticity, ppm, tempered, fracture, gypsum, approximation, translucent, worms, boron, calcium, deformation, durability, crystals, hardest, alloy, hardened, manganese, quartz, harder, mineral, indices, minerals, coating, scratch, melting, feeds, grinding, diamond, elastic, resistant, stainless, ions, titanium, resistance, scale, ceramic, temperature, diamonds, soft, oxidation, metals, specific, thermal, friction, ceramics, insects, metallic, steel, ranged, transparent, assumptions, crystal, nickel, strength, sodium, flexibility, blade, occurrence, banana, grains, measured.

Adjectives that are often used to describe hardness:
high, total, great, temporary, extreme, greater, permanent, maximum, certain, relative, higher, low, hot, average, lower, red, sufficient, excessive, superior, considerable, like, final, moderate, uniform, carbonate, unequal, initial, peculiar, apparent, minimum, cartilaginous, equal, mechanical, cold, highest, greatest, quenched, inferior, necessary, residual, extraordinary, comparative, proper, bony, characteristic, metallic, magnetic, unusual, exceptional, stony, absolute, noncarbonate, slight, sudden, measured, flinty, adamantine, intense, excellent, variable, micro, requisite, mean, masculine, impenetrable, intermediate, temperature, remarkable, judicial, superficial, tempered, extra, dynamic, ultimate.

Nouns that are often described by the adjective hardness:
test, tests, testing, values, measurements, increases, results, measurement, tester, number, numbers, distribution, increase, ions, changes, value, readings, data, determination, gravity, scale, removal, testers, penetration, ranges, determinations, levels, ratio, scales, range, variations, profiles, indentations, profile, curves, change, variation, salts, result, reduction, assurance, softness, decrease, strength, figure, conversions, resistance, methods, figures, differences, factor, proof, machines, index, anisotropy, properties, curve, table, impressions, steels, present, minerals, ratios, surveys, versus, pencils, common, conversion, depth, deposits, intensity, setting, leakage, tables, distributions, impression, obtainable, steel, machine, composition, fig, constituents, maximum, gradients.

Words that sound like hardness:
hardness, harness, hardiness, horridness, hoariness, weirdness, hotness, harshness, hard knocks, hairiness, hardass, heartiness, hard ass, hard nut, hereness, tartness, hardening, hoarseness, hartis, hortus, tiredness, hardest, heartless, harkness, hartless, harnessed, shortness, harda, hardees, heartedness, hard knock, hardman, hardiest, hardies, hard hats, hartney, hurriedness, hardee's, hardeman, hard sauce, hard-nosed, hardmen, hard nosed, tardiness, tardus, cardenas, sorriness, pardus, pardon us, sardius, carnous, czardas, horus, hornets, horace, heartening, hot mess, harnish, horniness, hartnett, hornless, horna, hardish, harnisch, howard hughes, harddisk, tardis, weariness, wideness, your highness, waywardness, woodness, herodias, torridness, harden, cowardice, hardens, hard way, hardie, hardee, hairdos, haras, hardey, hard day, hadas, hardi, hard man, cardis, cornus, hairnets, hardhats, hard case, hard up, hardcase, hard won, hair mousse, harden up, hardeners, cardus, dourness.