immutable.
Unable to be changed without exception.
Meaning & usage
Unable to be changed without exception.
The government has enacted an immutable law.
Not able to be altered in the memory after its value is set initially.
Constants are immutable.
Where this word comes from
From Middle English immutable, from Latin immūtābilis (“unchangeable”); im- + mutable.
Something that cannot be changed.
Where this word comes from
From Middle English immutable, from Latin immūtābilis (“unchangeable”); im- + mutable.
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Definitions, grammatical labels, IPA, etymology and examples: Wiktionary contributors, extracted by Kaikki / Wiktextract. Adapted under CC BY-SA 4.0. Selected fields and authored examples are shown; third-party quotations and audio are omitted. See contributor history.
Last enriched 2026-09-10. Definitions are in English. Romanizations are shown when supplied by the source; syllable estimates are omitted for unsupported scripts.