Inalterable

In‐al″ter‐a‐ble (?), a. [Pref. in- not + alterable: cf. F. inaltérable.] Not alterable; incapable of being altered or changed; unalterable. — In‐al″ter‐a‐ble‐ness, n. — In‐al″ter‐a‐bly, adv.