Serious
Serious adjective - Not joking or playful in mood or manner.
Unassertive and serious are semantically related In some cases you can use "Unassertive" instead an adjective "Serious".
Nearby Words: seriously, seriousness
Unassertive
Unassertive adjective - Inclined to timidity or lack of self-confidence.
Serious and unassertive are semantically related in reserved topic. Sometimes you can use "Serious" instead an adjective "Unassertive".
Cite this Source
Unassertive and Serious. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/serious/unassertive
Serious & Unassertive. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/serious/unassertive>.
Unassertive or Serious. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/serious/unassertive.
Google Ngram Viewer shows how "serious" and "unassertive" have occurred on timeline