It was next to unthinkable that the boy would steal.
Source: tatoeba (46419)
Unthinkable
//ʌnˈθɪŋkəbəl//
Synonyms for "unthinkable" (83 found)
Ranked by relevance and common usage.
Closest matches (17)
Strong matches (25)
hopelessillogicalimplausibleimpossibleimprobableincomprehensibleinconceivableincrediblelaughablelogically impossibleludicrousmind-blowingmind-bogglingnot deserving beliefnot possiblenot to be believedopen to doubtopen to suspicionout of questionout of the question
Show 2 more words
Adjective(3 words)
Related words (41)
Related word relations
OpenGloss and ConceptNet supply richer edges like generalizations, collocations, and derivations.
Antonyms
2 entriesderived from
1 entriesis a
1 entriesrelated to
11 entriessimilar
7 entriesTranslations
53 translations across 25 languages.
Arabic
2 entries- لَا يَخْطُرُ عَلَى الْبَالِ adj (incapable of being believed; incredible)
- لَا يَخْطُرُ عَلَى الْبَالِ adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Bulgarian
2 entries- невероятен adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
- немислим adj (incapable of being believed; incredible)
Catalan
2 entries- impensable adj (incapable of being believed; incredible)
- impensable adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Danish
3 entries- utrolig adj (incapable of being believed; incredible)
- utænkelig adj (incapable of being believed; incredible)
- utænkelig adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Dutch
1 entries- ondenkbaar adj (incapable of being believed; incredible)
Esperanto
1 entries- nepensebla adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Finnish
1 entries- käsittämätön adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
French
4 entries- impensable adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
- inconcevable adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
- incroyable adj (incapable of being believed; incredible)
- inimaginable adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Georgian
3 entries- დაუჯერებელი adj (incapable of being believed; incredible)
- წარმოუდგენელი adj (incapable of being believed; incredible)
- წარმოუდგენელი adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
German
3 entries- undenkbar adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
- unvorstellbar adj (incapable of being believed; incredible)
- unvorstellbar adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Greek
1 entries- αδιανόητος adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Hungarian
2 entries- elképzelhetetlen adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
- hihetetlen adj (incapable of being believed; incredible)
Italian
1 entries- impensabile adj (incapable of being believed; incredible)
Korean
1 entries- 상상도 할 수 없는 adj (incapable of being believed; incredible)
Latin
1 entries- incōgitābilis adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Norwegian Bokmål
1 entries- utenkelig adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Norwegian Nynorsk
3 entries- utenkeleg adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
- utenkjeleg adj (incapable of being believed; incredible)
- utenkjeleg adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Plautdietsch
1 entries- ondenkjboa adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Polish
1 entries- niewiarygodne adj (incapable of being believed; incredible)
Portuguese
2 entries- impensável adj (incapable of being believed; incredible)
- impensável adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Romanian
4 entries- de neconceput adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
- de neimaginat adj (incapable of being believed; incredible)
- imposibil adj (incapable of being believed; incredible)
- inconceptibil adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Russian
2 entries- немы́слимый adj (incapable of being believed; incredible)
- немы́слимый adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Spanish
1 entries- impensable adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Swedish
2 entries- otänkbar adj (incapable of being believed; incredible)
- otänkbar adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Turkish
3 entries- düşünülemez adj (incapable of being believed; incredible)
- düşünülemez adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
- kavranılamaz adj (inconceivable or unimaginable; extremely improbable in a way that goes against common sense)
Sample sentences
21 total sentences available.
It is practically unthinkable that a scientist of his stature would have made such an elementary mistake.
Source: tatoeba (304891)
Essentially it's a one-to-one match, but the content of that match is a level so high as to be unthinkable to an ordinary person.
Source: tatoeba (328256)
Productive thinking and creativity are unthinkable without imagination.
Source: tatoeba (1228280)
Showing 4 of 21 available sentences.
Keep exploring
Data sourced from Wiktionary, WordNet, CMU, and other open linguistic databases. Updated March 2026.