untransmutable

/ˌʌntrænzˈmjutəbəl/
adjective
  1. Not able to be changed into a different form or substance.
    • In alchemy, lead was thought to be untransmutable into gold by ordinary means.
    • Some scientists argue that certain elements are untransmutable under normal conditions.
    • The artist believed the raw emotion in the sculpture was untransmutable into words.
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