immutable

adjective

im·​mu·​ta·​ble (ˌ)i(m)-ˈmyü-tə-bəl 

: not capable of or susceptible to change

immutability

(ˌ)i(m)-ˌmyü-tə-ˈbi-lə-tē 

noun

immutableness

(ˌ)i(m)-ˈmyü-tə-bəl-nəs 

noun

immutably

(ˌ)i(m)-ˈmyü-tə-blē 

adverb

Did you know?

Immutable may describe something that is incapable of change, but the word itself—like all words—is mutable, both capable of and prone to alteration. To put a finer point on it, if language were fixed, we wouldn’t have immutable itself, which required a variety of mutations of the Latin verb mutare (“to change”) to reach our tongues (or pens, keyboards, or touchscreens—oh the many permutations of communication!). Other English words that can be traced back to mutare include mutate, transmute, and commute. Which reminds us—the mutability of language makes great food for thought during one’s commute.

Synonyms

• fixed
• hard-and-fast
• inalterable
• incommutable
• inflexible
• invariable
• unalterable
• unchangeable

Examples of immutable in a Sentence

the immutable laws of nature

one of the immutable laws of television is that low ratings inevitably lead to cancellation

Recent Examples on the Web

When the first sign of a cyberattack happens, a trigger automatically causes immutable snapshots to be taken of your organization’s data. —Eric Herzog, Forbes, 17 Oct. 2024

Then there's the immutable fact of biological aging itself. —Alice Park, TIME, 8 Oct. 2024

The data didn’t just show that people’s lives were guided by immutable facts like class and race. —German Lopez, New York Times, 25 July 2024

The sequel never even refers to the immutable law of capitalism that was the core argument of its predecessor. —Arvind Subramanian, Foreign Affairs, 9 June 2020

Word History

Etymology

Middle English, from Latin immutabilis, from in- + mutabilis mutable

First Known Use

15th century, in the meaning defined above

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Kids Definition

immutable

adjective

im·​mu·​ta·​ble (ˈ)im-ˈ(m)yüt-ə-bəl 

: impossible to change

immutability

(ˌ)im-ˌ(m)yüt-ə-ˈbil-ət-ē 

noun

immutably

(ˈ)im-ˈ(m)yüt-ə-blē 

adverb