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hardness noun

  /ˈhɑɹdnəs/ , /ˈhɑːdnəs/
  • The quality of being hard.
 твёрдость

hard adjective

  /hɑɹd/ , /hɑːd/
  • Resistant to pressure; difficult to break, cut, or penetrate.
 твёрдый, кре́пкий, про́чный
  • Difficult or requiring a lot of effort to do, understand, experience, or deal with.
  • Severe, harsh, unfriendly, brutal.
 тяжёлый, тру́дный
  • (of water) High in dissolved chemical salts, especially those of calcium.
 жёсткий
  • (of drink or drugs) Strong.
 кре́пкий
  • Unquestionable; unequivocal.
 неопровержимый
  • Demanding a lot of effort to endure.
 тру́дный, тяжёлый

hard adverb

  /hɑɹd/ , /hɑːd/
  • (manner) With much force or effort.
 си́льно
hardness gage
твердомер
hardness-testing machine
твердомер
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