immutable

Something that cannot be changed.

Adjective

  1. Unable to be changed without exception.
    • The government has enacted an immutable law.
    • 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,...
    • 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...

    Synonyms: unchangeable

  2. Not able to be altered in the memory after its value is set initially.
    • Constants are immutable.

Origin

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

Synonyms

bateless fixed immutable inalterable invariable permanent perma- perpetual unabateable unalterable unchangeable undeviating

Antonyms

mutable nonimmutable

Hypernyms

constant durable stable

Related

perennial changeless indomitable

Derived

immutableness immutably strongly immutable weakly immutable

Noun

  1. Something that cannot be changed.

Forms

immutables