日本語WordNet
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"
devoid of passion or feeling; hardheartedness
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"
excessive sternness; "severity of character"; "the harshness of his punishment was inhuman"; "the rigors of boot camp"
JMdict
AIによる解説
Hardness is the quality of being hard, firm, or unyielding. It can refer to physical hardness, water hardness, or a person's coldness.
ライセンス: KeyLang Original
Carbonado is prized in industry for its exceptional hardness and durability.
黒ダイヤモンドはその卓越した硬度と耐久性から産業界で珍重されている。
Hydroxyapatite gives teeth their hardness.
ヒドロキシアパタイトは歯に硬さを与える。
Martensite gives sword blades their exceptional hardness.
マルテンサイトは刀の刃に卓越した硬さを与えます。
Pronunciation data from ipa-dict (MIT License) based on cmudict-ipa by @lingz