Impossible
Impossible adjective - Incapable of being solved or accomplished.
Usage example: fitting everything in my backpack seemed an impossible task
Reasonable is an antonym for impossible in topics: unachievable, intolerable, beyond the bounds of possibility.
Nearby Words: impossibility, impossibly
Reasonable
Reasonable adjective - According to the rules of logic.
Both words in one sentence
- Blade felt he had a lot of similarities with The Punisher but had to question why Frank Castle pursued a seemingly impossible goal while Blade felt his own was much more reasonable (he even succeeded once already).
Source: Not So Similar - Compromise eventually becomes totally impossible as the actual reasonable people are killed off one by one by accident or to spark the war.
Source: Crapsack World / Video Games - This trope is so common ("Be reasonable — demand the impossible." —Old slogan of the soixante-huitards) that it's faster to list the aversions.
Cite this Source
Reasonable and Impossible. (2016). Retrieved 2026, August 08, from https://thesaurus.plus/related/impossible/reasonable
Impossible & Reasonable. N.p., 2016. Web. 08 Aug. 2026. <https://thesaurus.plus/related/impossible/reasonable>.
Reasonable or Impossible. 2016. Accessed August 08, 2026. https://thesaurus.plus/related/impossible/reasonable.
Google Ngram Viewer shows how "impossible" and "reasonable" have occurred on timeline