Kill
Kill verb - To use up all the physical energy of.
Usage example: the long hike up the mountain just about killed us
Strengthen is an antonym for kill.
Strengthen
Strengthen verb - To increase the ability of (as a muscle) to exert physical force.
Nearby Words: strength, strengthening
Common collocations
Both words in one sentence
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Noah is willing to kill his granddaughters to ensure the human race would end, while Tubal-Cain actively condoned cannibalism and rape to strengthen his forces.
Source: Film / Noah -
Deconstruction: The game gives us a glimpse into the psyche of the kind of person in an RPG who would be willing to kill a buttload of people in order to strengthen his weapons and level himself up.
Source: Video Game / Drakengard - This is pretty much proven when it's revealed that everything in Nozomu's suicide kit is designed to not kill him, and that he regularly goes to the gym to strengthen his neck to survive his frequent hanging attempts.
Cite this Source
Strengthen and Kill. (2016). Retrieved 2026, July 22, from https://thesaurus.plus/related/kill/strengthen
Kill & Strengthen. N.p., 2016. Web. 22 Jul. 2026. <https://thesaurus.plus/related/kill/strengthen>.
Strengthen or Kill. 2016. Accessed July 22, 2026. https://thesaurus.plus/related/kill/strengthen.
Google Ngram Viewer shows how "kill" and "strengthen" have occurred on timeline