The Collaborative International Dictionary
Inalterableness
Inalterable \In*al"ter*a*ble\, a. [Pref. in- not + alterable: cf. F. inalt['e]rable.] Not alterable; incapable of being altered or changed; unalterable. -- In*al"ter*a*ble*ness, n. -- In*al"ter*a*bly, adv.
Wiktionary
inalterableness
n. The state or quality of being inalterable.