Formal and Unsuitable

Formal

Formal adjective - Following or agreeing with established form, custom, or rules.
Usage example: a formal contract that was legally binding

Unsuitable is an antonym for formal.

Unsuitable

Unsuitable adjective - Not appropriate for a particular occasion or situation.

Formal is an antonym for unsuitable.

Nearby Word: unsuitably
Cite this Source
Unsuitable and Formal. (2016). Retrieved 2026, August 07, from https://thesaurus.plus/related/formal/unsuitable
Formal & Unsuitable. N.p., 2016. Web. 07 Aug. 2026. <https://thesaurus.plus/related/formal/unsuitable>.
Unsuitable or Formal. 2016. Accessed August 07, 2026. https://thesaurus.plus/related/formal/unsuitable.
Google Ngram Viewer shows how "formal" and "unsuitable" have occurred on timeline