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
Relentless is a synonym for implacable in merciless topic. In some cases you can use "Relentless" instead an adjective "Implacable", when it comes to topics like ruthless, uncompromising, unrelenting, inexorable. popular alternative
Nearby Words: implacability, implacably
Relentless
Relentless adjective - Showing no signs of slackening or yielding in one's purpose.
Usage example: the team's offense was relentless in trying to score a touchdown
Implacable is a synonym for relentless in merciless topic. You can use "Implacable" instead an adjective "Relentless", if it concerns topics such as inflexible, uncompromising, unrelenting, cruel. popular alternative
Nearby Word: relentlessly
Mutual synonyms
Related pairs
- inflexible and implacable
- inflexible and relentless
- rigid and implacable
- rigid and relentless
- unyielding and implacable
- unyielding and relentless
- hard and implacable
- hard and relentless
- merciless and implacable
- merciless and relentless
- grim and implacable
- grim and relentless
- stern and implacable
- stern and relentless
Both words in one sentence
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Charlie first came to prominence by being a no-name meat with no previous real experience in a warm-up match, giving a supposed world-class boxer quite a scare by being relentless and implacable.
Source: Film / Real Steel -
Implacable Man: The Reaper is silent, steady and absolutely relentless in its pursuit of the heroes, surviving crossbow bolts, sword blows, and at least one giant explosion.
Source: Series / The Shannara Chronicles - Implacable Man: Your stalker is just as relentless in his pursuit of you as Nemesis is.
Source: Video Game / Hysteria Project
Cite this Source
Relentless and Implacable. (2016). Retrieved 2026, August 14, from https://thesaurus.plus/related/implacable/relentless
Implacable & Relentless. N.p., 2016. Web. 14 Aug. 2026. <https://thesaurus.plus/related/implacable/relentless>.
Relentless or Implacable. 2016. Accessed August 14, 2026. https://thesaurus.plus/related/implacable/relentless.
Google Ngram Viewer shows how "implacable" and "relentless" have occurred on timeline