[hahrd-nis] /ˈhɑrd nɪs/

the state or quality of being :
the hardness of ice.
a relative degree or extent of this quality:
wood of a desirable hardness.
that quality in water that is imparted by the presence of dissolved salts, especially calcium sulfate or bicarbonate.
unfeelingness or jadedness; callousness.
harshness or austerity, as of a difficult existence.
South Midland U.S. ill will; bad feelings:
There’s a lot of hardness between those two boys.
Mineralogy. the comparative ability of a substance to scratch or be scratched by another.
Compare .
Metallurgy. the measured resistance of a metal to indention, abrasion, deformation, or machining.
the quality or condition of being hard
one of several measures of resistance to indentation, deformation, or abrasion See Mohs scale, Brinell hardness number
the quality of water that causes it to impair the lathering of soap: caused by the presence of certain calcium salts. Temporary hardness can be removed by boiling whereas permanent hardness cannot

Old English heardnysse; see hard + -ness. Meaning “difficulty of action or accomplishment” is late 14c.
A measure of how easily a mineral can be scratched. Hardness is measured on the Mohs scale.


Read Also:

  • Hard-nose

    [hahrd-nohz] /ˈhɑrdˌnoʊz/ noun, Slang. 1. a person who is tough, practical, and unsentimental, especially in business: We need a hard-nose to run the department.

  • Hard-nosed

    [hahrd-nohzd] /ˈhɑrdˌnoʊzd/ adjective, Informal. 1. hardheaded or tough; unsentimentally practical: a hard-nosed labor leader. adjective 1. (informal) tough, shrewd, and practical adj. “stubborn,” 1927, from hard + nose (n.). Earlier of bullets or shells with hard tips, and of dogs that had difficulty following a scent. Not in common use before 1950s, when it begins […]

  • Hard nut

    noun a difficult or uncompromising person; a tough and insensitive person Examples He’s a hard nut, all right. Word Origin 1888 Usage Note slang noun A difficult or uncompromising person: was a hard nut, that’s for sure (1888+)

  • Hard-of-hearing

    [hahrd-uh v-heer-ing] /ˈhɑrd əvˈhɪər ɪŋ/ adjective, noun 1. .

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