Incommutable
ahd-5
adjective.
Not able to be exchanged one for another.
adjective.
That cannot be altered.
The Century Dictionary and Cyclopedia
Not commutable; incapable of being commuted or exchanged with another.
the GNU version of the Collaborative International Dictionary of English
adjective.
Not commutable; not capable of being exchanged with, or substituted for, another.
Wiktionary, Creative Commons Attribution/Share-Alike License
adjective.
Not
commutable
WordNet 3.0 Copyright 2006 by Princeton University. All rights reserved.
adjective.
not interchangeable or able to substitute one for another
adjective.
not subject to alteration or change
Equivalent
inconvertible
unalterable
unexchangeable
untransmutable
Synonym
Words with the same meaning
changeless
constant
immutable
inconvertible
indefeasible