Implacable
Implacable adjective - Sticking to an opinion, purpose, or course of action in spite of reason, arguments, or persuasion.
Tough and implacable are semantically related. in inexorable topic. In some cases you can use "Tough" instead an adjective "Implacable".
Nearby Words: implacability, implacably
Tough
Tough adjective - Given to exacting standards of discipline and self-restraint.
Usage example: a tough supervisor who docked the pay of anyone who punched in late, no matter what the reason
Implacable and tough are semantically related. Sometimes you can use "Implacable" instead an adjective "Tough".
Mutual synonyms
Related pairs
Both words in one sentence
- Implacable Man: Kull Warriors are still tough nuts even with X-COM armour and weapons.
Source: Fanfic / XSGCOM -
Implacable Man: Pittsy, Barracuda and the Mennonite all manage to nearly kill Frank by virtue the fact that they're really, really tough.
Source: Comic Book / The Punisher MAX -
The T-800 Terminator in The Terminator is a Super Tough hulking Implacable Man with an immunity to bullets, pitted against human fighters.
Source: Franchise / Terminator
Cite this Source
Tough and Implacable. (2016). Retrieved 2026, July 21, from https://thesaurus.plus/related/implacable/tough
Implacable & Tough. N.p., 2016. Web. 21 Jul. 2026. <https://thesaurus.plus/related/implacable/tough>.
Tough or Implacable. 2016. Accessed July 21, 2026. https://thesaurus.plus/related/implacable/tough.
Google Ngram Viewer shows how "implacable" and "tough" have occurred on timeline