Pertinacious and Perfidious

Opposite meaning words

Pertinacious adjective - Continuing despite difficulties, opposition, or discouragement.

Usage example: a pertinacious little boy who was determined to catch and collect reptiles

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Perfidious is an antonym for pertinacious.

Nearby Word: pertinacity

Perfidious adjective - Not true in one's allegiance to someone or something.

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Pertinacious is an antonym for perfidious.

Nearby Words: perfidy, perfidiously

Cite this Source

Perfidious and Pertinacious. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/pertinacious/perfidious

Pertinacious & Perfidious. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/pertinacious/perfidious>.

Perfidious or Pertinacious. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/pertinacious/perfidious.

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