Fixed and Fluid

Fixed

Fixed adjective - Having been established and usually not subject to change.
Usage example: the baseball card dealer's prices were fixed, so bargaining was not an option

Fluid is an antonym for fixed.

Nearby Words: fix, fixing, fixedly, fixation, fixer

Fluid

Fluid adjective - Capable of being readily changed.
Usage example: the script is still fluid at this point, so be prepared for last-minute rewrites

Fixed is an antonym for fluid in changeable topic.

Nearby Word: fluidity
Cite this Source
Fluid and Fixed. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/fixed/fluid
Fixed & Fluid. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/fixed/fluid>.
Fluid or Fixed. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/fixed/fluid.
Google Ngram Viewer shows how "fixed" and "fluid" have occurred on timeline