IPA: /ɪnˈkʌmjʊtəbl/
KK: /ɪnˈkɑːmjʊtəbl/
Something that cannot be exchanged or changed for something else.
Her unique talent is an incommutable skill that sets her apart from others.
Incommutable → It is formed from "in-" (meaning not) and "commutare" (meaning to exchange or interchange). The word describes something that cannot be exchanged or interchanged.
Think of 'not' ('in-') being able to 'exchange' ('commutare') something — that's why incommutable means something that cannot be exchanged.