immutable

I1M3M3U1T1A1B3L1E1

adjective

Unable to be changed without exception.

“Constants are immutable.”

Similar
unchangeablebatelessfixedinalterableinvariablepermanentperma-perpetual
Opposite
mutablenonimmutable
OriginMiddle English immutable ← Latin immūtābilis →
Less commonScrabble 15
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Meanings

adjectiveimmutable (not comparable)
  1. not comparableUnable to be changed without exception.

    The government has enacted an immutable law.

    2 more examples

    Mutable as is our nature, it delights in the immutable: and we expect as much constancy as if all time, to say nothing of our own changeableness, had not shewn that ever "the fashion of this world passeth away."

    1834, L[etitia] E[lizabeth] L[andon], chapter XIV, in Francesca Carrara. […], volume II, London: Richard Bentley, […], (successor to Henry Colburn), →OCLC, page 171

    In the trustless cryptocurrency world, you can still trust the cryptocurrency community and its mechanisms to ensure that the blockchain contains an accurate and immutable—unchangeable—record of cryptocurrency transactions.

    2019, Peter Kent, Tyler Bain, Cryptocurrency Mining For Dummies, John Wiley & Sons, →ISBN, page 30

    Synonyms: unchangeable

  2. not comparablecomputingNot able to be altered in the memory after its value is set initially.

    Constants are immutable.

nounimmutable (plural immutables)

plural immutables

  1. Something that cannot be changed.

Synonyms & antonyms

adjectiveUnable to be changed without exception.

Similar
unchangeable
Similar
batelessfixedinalterableinvariablepermanentperma-perpetualunabateableunalterableundeviating
Opposite
mutablenonimmutable
Broader
constantdurablestable

More synonyms by meaning

adjectivenot subject or susceptible to change or variation in form or quality or nature

Similar
changeless
Opposite
mutable

adjectiveconstant and unchanging

Similar
constant
Also see
batelesschangelessconstantfixednonmodifiablestationaryunmodifiable

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Latinimmūtābilis“unchangeable”
  2. Middle Englishimmutable
  3. Englishimmutable

From Middle English immutable, from Latin immūtābilis (“unchangeable”); im- + mutable.

More words from Middle English, Latin

Full word history & related roots →

Translations

Ancient Greek ἀμετάθετος
  • ἀμετάθετος (ametáthetos)unable to be changed without exception
Bulgarian неизменен, неотменим
  • неизменен (neizmenen)unable to be changed without exception
  • неотменим (neotmenim)unable to be changed without exception
Catalan immutable
  • immutableunable to be changed without exception
Czech nezměnitelný
  • nezměnitelnýunable to be changed without exception
Dutch onveranderlijk
  • onveranderlijkunable to be changed without exception
Finnish muuttumaton
  • muuttumatonunable to be changed without exception
French immuable, immutable
  • immuableunable to be changed without exception
  • immutableunable to be changed without exception
German unveränderbar, unveränderlich
  • unveränderbarunable to be changed without exception
  • unveränderlichunable to be changed without exception
Italian immutabile
  • immutabileunable to be changed without exception
Japanese 不変の
  • 不変の (fuhen no)unable to be changed without exception
Persian دگرشناپذیر
  • دگرشناپذیرunable to be changed without exception
Polish niezmienny
  • niezmiennyunable to be changed without exception
Portuguese imutável
  • imutávelunable to be changed without exception
Romanian imuabil, neschimbător
  • imuabilunable to be changed without exception
  • neschimbătorunable to be changed without exception
Russian неизме́нный, непрело́жный
  • неизме́нный (neizménnyj)unable to be changed without exception
  • непрело́жный (neprelóžnyj)unable to be changed without exception
  • постоя́нный (postojánnyj)unable to be changed without exception
Spanish inmutable
  • inmutableunable to be changed without exception
Swedish oföränderlig
  • oföränderligunable to be changed without exception
Turkish değişmez, sabit
  • değişmezunable to be changed without exception
  • sabitunable to be changed without exception

Rhymes & wordplay

Anagrams

multibeam
Cite this entry
APA

immutable. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/immutable

MLA

“immutable.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/immutable. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “immutable,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/immutable.

Source: immutable on Wiktionary, CC BY-SA 4.0.