Formal
Reserved
Reserved adjective - Tending not to speak frequently (as by habit or inclination).
Formal is a synonym for reserved in uncommunicative topic. Sometimes you can use "Formal" instead an adjective "Reserved", if it concerns topics such as silent.
Mutual synonyms
Both words in one sentence
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Sugar and Ice Personality: Horatio is reserved and formal with most people, even beyond the point required by naval hierarchy.
Source: Series / Horatio Hornblower - Similarly, outfits made entirely from black leather will be reserved for formal occasions.
Source: Evil Overlord List -
In Persona 3, Mitsuru Kirijo fits the personality to a tee, being elegant, reserved, formal, and favors a classy rapier as her weapon.
Source: Lady of War
Cite this Source
Reserved and Formal. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/formal/reserved
Formal & Reserved. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/formal/reserved>.
Reserved or Formal. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/formal/reserved.
Google Ngram Viewer shows how "formal" and "reserved" have occurred on timeline