Incommutable

In′com‐mut″a‐ble (?), a. [L. incommutabilis: cf. F. incommutable. See In- not, and Commutable.] Not commutable; not capable of being exchanged with, or substituted for, another. Cudworth. — In′com‐mut″a‐ble‐ness, n. — In′com‐mut″a‐bly, adv.