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refractory adjective

  /ɹɪˈfɹæk.təɹ.i/
  • (medicine) Resistant to treatment; not responding adequately to therapy.
 ανθεκτικός, δυσίατος
  • Obstinate and unruly; strongly opposed to something.
 ανυπότακτος
  • Not affected by great heat.
 δύστηκτος, πυρίμαχος

refractory noun

  /ɹɪˈfɹæk.təɹ.i/
  • A material or piece of material, such as a brick, that has a very high melting point.
 πυρίμαχος
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