Main entry: inconvertible, unconvertible, unexchangeable
Definition: used especially of currencies; incapable of being exchanged for or replaced by another currency of equal value
Antonyms: exchangeable, convertible
Definition: capable of being exchanged for or replaced by something of equal value
Main entry: unexchangeable
Definition: not suitable to be exchanged
Antonyms: exchangeable
Definition: suitable to be exchanged
Antonyms: commutable
Definition: subject to alteration or change