Inconvertible
[adj] not capable of being changed into something else; "the alchemists were unable to accept the inconvertible nature of elemental metals"
[adj] used especially of currencies; incapable of being exchanged for or replaced by another currency of equal value
Related Information
Related Terms
changeless, constant, immutable, incommutable, indefeasible, inert, insusceptible of change, intransmutable, invariable, irredeemable, irretrievable, irreversible, irrevocable, lasting, noble, nonreturnable, nonreversible, permanent, reverseless, unaltera