Diffident and Doubtful

Diffident

Diffident adjective - Not comfortable around people.

Doubtful is a synonym for diffident in hesitant topic. In some cases you can use "Doubtful" instead an adjective "Diffident", when it comes to topics like shy, insecure.

Nearby Words: diffidence, diffidently

Doubtful

Doubtful adjective - Not feeling sure about the truth, wisdom, or trustworthiness of someone or something.
Usage example: he was doubtful about the decision to complete the project despite its mounting problems

Diffident is a synonym for doubtful. Sometimes you can use "Diffident" instead an adjective "Doubtful".

Cite this Source
Doubtful and Diffident. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/diffident/doubtful
Diffident & Doubtful. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/diffident/doubtful>.
Doubtful or Diffident. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/diffident/doubtful.
Google Ngram Viewer shows how "diffident" and "doubtful" have occurred on timeline