Definition of hardness

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Hardness (n.) 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..

Lern More About Hardness

Iron :: Iron (n.) Like iron in hardness, strength, impenetrability, power of endurance, insensibility, etc.;.
Obduracy :: Obduracy (n.) The duality or state of being obdurate; invincible hardness of heart; obstinacy.
Chill :: Chill (v. t.) To produce, by sudden cooling, a change of crystallization at or near the surface of, so as to increase the hardness; said of cast iron..
Wireworm :: Wireworm (n.) One of the larvae of various species of snapping beetles, or elaters; -- so called from their slenderness and the uncommon hardness of the integument. Wireworms are sometimes very destructive to the roots of plants. Called also wire grub..
Sclerometer :: Sclerometer (n.) An instrument for determining with accuracy the degree of hardness of a mineral.
Difficulty :: Difficulty (n.) The state of being difficult, or hard to do; hardness; arduousness; -- opposed to easiness or facility; as, the difficulty of a task or enterprise; a work of difficulty..
Opal :: Opal (n.) A mineral consisting, like quartz, of silica, but inferior to quartz in hardness and specific gravity..
Adamant :: Adamant (n.) A stone imagined by some to be of impenetrable hardness; a name given to the diamond and other substances of extreme hardness; but in modern mineralogy it has no technical signification. It is now a rhetorical or poetical name for the embodiment of impenetrable hardness.
Hardness :: Hardness (n.) The quality or state of being hard, literally or figuratively..
Obduredness :: Obduredness (n.) Hardness.
Tempering :: Tempering (n.) The process of giving the requisite degree of hardness or softness to a substance, as iron and steel; especially, the process of giving to steel the degree of hardness required for various purposes, consisting usually in first plunging the article, when heated to redness, in cold water or other liquid, to give an excess of hardness, and then reheating it gradually until the hardness is reduced or drawn down to the degree required, as indicated by the color produced on a polished p
Obfirmation :: Obfirmation (n.) Hardness of heart; obduracy.
Diamond :: Diamond (n.) A precious stone or gem excelling in brilliancy and beautiful play of prismatic colors, and remarkable for extreme hardness..
Grain :: Grain (n.) The composite particles of any substance; that arrangement of the particles of any body which determines its comparative roughness or hardness; texture; as, marble, sugar, sandstone, etc., of fine grain..
Mollify :: Mollify (v. t.) To soften; to make tender; to reduce the hardness, harshness, or asperity of; to qualify; as, to mollify the ground..
Rigor :: Rigor (n.) Stiffness of opinion or temper; rugged sternness; hardness; relentless severity; hard-heartedness; cruelty.
Temper :: Temper (v. t.) To bring to a proper degree of hardness; as, to temper iron or steel..
Petrify :: Petrify (v. i.) To become stone, or of a stony hardness, as organic matter by calcareous deposits..
Brassy :: Brassy (a.) Of or pertaining to brass; having the nature, appearance, or hardness, of brass..
Crustiness :: Crustiness (n.) The state or quality of having crust or being like crust; hardness.
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