hermetic - definition and synonyms

adjective 

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/hɜː(r)ˈmetɪk/
  1. 1
    formal deliberately staying separate from other people

    a hermetic life

  2. 2
    physics closed tightly, so that no air can get in or out
     Synonyms and related words

derived word

hermetically

 

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/hɜː(r)ˈmetɪkli/
adverb