Immutable
Immutable adjective - Not capable of changing or being changed.
Stiff and immutable are semantically related. In some cases you can use "Stiff" instead an adjective "Immutable".
Nearby Word: immutability
Mutual synonyms
Cite this Source
Stiff and Immutable. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/immutable/stiff
Immutable & Stiff. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/immutable/stiff>.
Stiff or Immutable. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/immutable/stiff.
Google Ngram Viewer shows how "immutable" and "stiff" have occurred on timeline