Probably
Probably adverb - By reasonable assumption.
Unthinkable is an antonym for probably.
Nearby Words: probable, probability
Unthinkable
Both words in one sentence
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If the unthinkable did happen, they would probably have read out an edited version of the eulogy written for Apollo 11.
Source: Burial in Space - This has influenced subsequent adaptations of the property; it is probably now unthinkable for Kato not to be a martial arts master in any new adaptation of The Green Hornet in any medium.
Source: The Cast Showoff -
This has influenced subsequent adaptations of the property; it is now probably unthinkable for Kato ''not'' to be a martial arts master in any new adaptation of The Green Hornet in any medium.
Source: Franchise / The Green Hornet
Cite this Source
Unthinkable and Probably. (2016). Retrieved 2026, August 18, from https://thesaurus.plus/related/probably/unthinkable
Probably & Unthinkable. N.p., 2016. Web. 18 Aug. 2026. <https://thesaurus.plus/related/probably/unthinkable>.
Unthinkable or Probably. 2016. Accessed August 18, 2026. https://thesaurus.plus/related/probably/unthinkable.
Google Ngram Viewer shows how "probably" and "unthinkable" have occurred on timeline