Implacable and Unrelenting

Implacable

Implacable adjective - Sticking to an opinion, purpose, or course of action in spite of reason, arguments, or persuasion.
Usage example: an implacable judge who knew in his bones that the cover-up extended to the highest levels of government

Unrelenting is a synonym for implacable in merciless topic. In some cases you can use "Unrelenting" instead an adjective "Implacable", when it comes to topics like ruthless, relentless, grim, uncompromising. popular alternative

Nearby Words: implacability, implacably

Unrelenting

Unrelenting adjective - Sticking to an opinion, purpose, or course of action in spite of reason, arguments, or persuasion.
Usage example: that professor tends to be unrelenting about deadlines

Implacable is a synonym for unrelenting in merciless topic. You can use "Implacable" instead an adjective "Unrelenting", if it concerns topics such as relentless, grim, uncompromising, ruthless. popular alternative

Nearby Word: unrelentingly
Cite this Source
Unrelenting and Implacable. (2016). Retrieved 2026, August 16, from https://thesaurus.plus/related/implacable/unrelenting
Implacable & Unrelenting. N.p., 2016. Web. 16 Aug. 2026. <https://thesaurus.plus/related/implacable/unrelenting>.
Unrelenting or Implacable. 2016. Accessed August 16, 2026. https://thesaurus.plus/related/implacable/unrelenting.
Google Ngram Viewer shows how "implacable" and "unrelenting" have occurred on timeline