untransmutable
Speech parts
1. untransmutable - Adjective
2. untransmutable - Adjective Satellite
Meaning
not capable of being changed into something else
Source: WordNetSynonyms
inconvertible
irreversible
indivisible
immutable
inalienable
unchangeable
irrevocable
unbreakable
unmodifiable
incommutable
irredeemable
inseparable
translatable
nontransferable
incommunicable
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Antonyms
Examples
the alchemists were unable to accept the inconvertible nature of elemental metals