Grumble about
Knock and grumble about are semantically related. In some cases you can use "Knock" instead a verb "Grumble about".
Knock
Knock verb - To come into usually forceful contact with something.
Grumble about and knock are semantically related. Sometimes you can use "Grumble about" instead a verb "Knock".
Cite this Source
Knock and Grumble about. (2016). Retrieved 2026, August 03, from https://thesaurus.plus/related/grumble_about/knock
Grumble about & Knock. N.p., 2016. Web. 03 Aug. 2026. <https://thesaurus.plus/related/grumble_about/knock>.
Knock or Grumble about. 2016. Accessed August 03, 2026. https://thesaurus.plus/related/grumble_about/knock.
Google Ngram Viewer shows how "grumble about" and "knock" have occurred on timeline