unalterability

On the third point: the indissolubility and unalterability of which

Nature and Grace: Selections from the Summa Theologica of Thomas Aquinas 1954

He read on her set lips the unalterability of her determination.

The Workingman's Paradise An Australian Labour Novel John Maurice Miller

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.

The Economic Aspect of Geology 1915

[237] I insist upon this unalterability of colour the more because I address you as a beginner, or an amateur; a great artist can sometimes get out of a difficulty with credit, or repent without confession.

The Crown of Wild Olive also Munera Pulveris; Pre-Raphaelitism; Aratra Pentelici; The Ethics of the Dust; Fiction, Fair and Foul; The Elements of Drawing John Ruskin 1859

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.

More Letters of Charles Darwin — Volume 1 Charles Darwin 1845