Colourless
Colourless adjective - Weak in color; not colorful.
Passive and colourless are semantically related. In some cases you can use "Passive" instead an adjective "Colourless".
Passive
Passive adjective - Receiving or enduring without offering resistance.
Colourless and passive are semantically related. Sometimes you can use "Colourless" instead an adjective "Passive".
Cite this Source
Passive and Colourless. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/colourless/passive
Colourless & Passive. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/colourless/passive>.
Passive or Colourless. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/colourless/passive.
Google Ngram Viewer shows how "colourless" and "passive" have occurred on timeline