Adjective commutable has 2 senses
  1. commutable - subject to alteration or change; "the death sentence was commutable to life imprisonment"
    Antonyms:
    incommutable, inconvertible, untransmutable, unalterable
  2. commutable, substitutable - capable of being exchanged for another or for something else that is equivalent
    Antonym: unexchangeable (indirect, via exchangeable)
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