immutable

[ ih-myoo-tuh-buh l ]

/ ɪˈmyu tə bəl /

not mutable; unchangeable; changeless.

Origin of immutable

First recorded in 1375–1425; late Middle English word from Latin word immūtābilis. See im-², mutable

im·mu·ta·bil·i·ty, im·mu·ta·ble·ness, noun im·mu·ta·bly, adverb

AIPAC officials have long argued that American aid “has come to represent the immutability of the U.S.-Israel alliance.”

Should U.S. Military Aid To Israel Be Cut? |Brent E. Sasley |January 21, 2013 |DAILY BEAST
Both had been constrained to feel that the immutability of species could not be maintained.

Darwin and Modern Science |A.C. Seward and Others
The Immutability of the Law will be treated in detail later.

A History of Mediaeval Jewish Philosophy |Isaac Husik
This brings us to another important question—is not the creative power of the Word limited by the immutability of the Law?

The Law and the Word |Thomas Troward

This immutability of the constitution of France is a necessary consequence of the laws of that country.

American Institutions and Their Influence |Alexis de Tocqueville et al.
But their immutability is not a matter of experience, but is known to thought.

A Critical History of Greek Philosophy |W. T. Stace

immutable

/ (ɪˈmjuːtəbəl) /

unchanging through time; unalterable; ageless immutable laws

immutability or immutableness, noun immutably, adverb