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harden verb

  /ˈhɑɹdn̩/ , /ˈhɑːdn̩/
  • (intransitive) To become hard.
  • (transitive, ergative) To make something hard or harder.
  • (ambitransitive) To become or make (a person or thing) resistant or less sensitive.
  • (ambitransitive, phonology) To become or make (a consonant) more fortis; to (cause to) undergo fortition.
 σκληρύνω

hardening

σκλήρυνση
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