He read on her set lips the unalterability of her determination.    From Wordnik.com.  [The Workingman's Paradise An Australian Labour Novel] Reference

On the third point: the indissolubility and unalterability of which.    From Wordnik.com.  [Nature and Grace: Selections from the Summa Theologica of Thomas Aquinas] Reference

Aluminum is used principally in castings and drawn and pressed ware, for purposes in which lightness, malleability, and unalterability under ordinary chemical reagents are desired.    From Wordnik.com.  [The Economic Aspect of Geology] Reference

A much higher idea of change than I had previously entertained; and though, as you know, never very stubborn about unalterability of specific type, I never felt so shaky about species before.    From Wordnik.com.  [More Letters of Charles Darwin — Volume 1] Reference

You see how, starting from considerations based on the immediate practical interests of technical work, we have been led up to a universal natural law, which, as far as all previous experience extends, rules and embraces all natural processes; which is no longer restricted to the practical objects of human utility, but expresses a perfectly general and particularly characteristic property of all natural forces, and which, as regards generality, is to be placed by the side of the laws of the unalterability of mass, and the unalterability of the chemical elements.    From Wordnik.com.  [On the Conservation of Force] Reference