Mutable and Unalterable

Mutable

Mutable adjective - Likely to change frequently, suddenly, or unexpectedly.

Unalterable is an antonym for mutable.

Nearby Words: mutation, mutate, mutability, mutating, mutably

Unalterable

Unalterable adjective - Not capable of changing or being changed.
Usage example: the rules of the game are unalterable, regardless of who is playing

Mutable is an antonym for unalterable.

Nearby Words: unaltered, unalterably
Cite this Source
Unalterable and Mutable. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/mutable/unalterable
Mutable & Unalterable. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/mutable/unalterable>.
Unalterable or Mutable. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/mutable/unalterable.
Google Ngram Viewer shows how "mutable" and "unalterable" have occurred on timeline