alterable

[ awl-ter-uh-buh l ]

/ ˈɔl tər ə bəl /

capable of being altered.

Origin of alterable

First recorded in 1520–30; alter + -able

al·ter·a·bil·i·ty, al·ter·a·ble·ness, noun al·ter·a·bly, adverb re·al·ter·a·ble, adjective re·al·ter·a·ble·ness, noun

re·al·ter·a·bly, adverb

So if Truth is an alterable and shifting concept, must not morality likewise be variable?

Prophets of Dissent |Otto Heller
The provisions with respect to this second order fall within the class of enactments which are alterable by the Irish Legislature.

Handbook of Home Rule (1887) |W. E. Gladstone et al.
Must we regard this emotional endowment of woman as permanent or alterable?

The Truth About Woman |C. Gasquoine Hartley
The very fourth commandment, however it was a perpetual law as to the proportion of time, yet was alterable as to the seventh day.

A Christian Directory |Baxter Richard

Our sentence we cannot alter; a Court's sentence is alterable only by appeal; your Majesty decides where the appeal is to lie!

History of Friedrich II. of Prussia, Vol. XXI. (of XXI.) |Thomas Carlyle