Doubtless and Unsure

Opposite meaning words

Doubtless adjective - Having or showing a mind free from doubt.

Usage example: another one of his doubtless predictions that will never come true

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Unsure is an antonym for doubtless.

Nearby Words: doubt, doubtful, doubtlessly

Unsure adjective - Not feeling sure about the truth, wisdom, or trustworthiness of someone or something.

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Doubtless is an antonym for unsure.

Cite this Source

Unsure and Doubtless. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/doubtless/unsure

Doubtless & Unsure. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/doubtless/unsure>.

Unsure or Doubtless. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/doubtless/unsure.

Google Ngram Viewer shows how "doubtless" and "unsure" have occurred on timeline