Firm
Firm adjective - Having been established and usually not subject to change.
Usage example: the selling price of the house is firm, so there'll be no dickering
Nonnegotiable and firm are semantically related. In some cases you can use "Nonnegotiable" instead an adjective "Firm".
Nonnegotiable
Firm and nonnegotiable are semantically related. You can use "Firm" instead an adjective "Nonnegotiable".
Mutual synonyms
Cite this Source
Nonnegotiable and Firm. (2016). Retrieved 2026, July 28, from https://thesaurus.plus/related/firm/nonnegotiable
Firm & Nonnegotiable. N.p., 2016. Web. 28 Jul. 2026. <https://thesaurus.plus/related/firm/nonnegotiable>.
Nonnegotiable or Firm. 2016. Accessed July 28, 2026. https://thesaurus.plus/related/firm/nonnegotiable.
Google Ngram Viewer shows how "firm" and "nonnegotiable" have occurred on timeline