#unexchangeability  the quality of being incapable of exchange or interchange
  exclusion:  #exchangeability
  supertype:  #unchangeability__changelessness__unchangeableness__unchangingness  the quality of being unchangeable; having a marked tendency to remain unchanged
  subtype:  #incommutability  the quality of being not interchangeable
  subtype:  #irreplaceableness__irreplaceablenes  the quality of being irreplaceable

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