unthinkable

U1N1T1H4I1N1K5A1B3L1E1
/ʌnˈθɪŋkəbəl/

adjective

That cannot be believed.

“do the unthinkable”

Opposite
Less commonScrabble 20

Meanings

adjectiveunthinkable (comparative more unthinkable, superlative most unthinkable)

comparative more unthinkable · superlative most unthinkable

  1. That cannot be believed.

    Near-synonyms: unbelievable, incredible, inconceivable

    Synonyms: unbelievable, incredible, inconceivable

  2. Inconceivable or unimaginable; extremely improbable in a way that goes against common sense.

    Near-synonyms: inconceivable, imponderable

    4 more examples

    Nothing is unthinkable, nothing impossible to the balanced person, provided it comes out of the needs of life and is dedicated to life's further development

    With 16 minutes left on the clock and the tension climbing through the roof, Trinh-Duc tried his luck with a penalty from just inside halfway only to push it wide, but the unthinkable now seemed a real possibility.

    2011 October 23, Tom Fordyce, “2011 Rugby World Cup final: New Zealand 8-7 France”, in BBC Sport, archived from the original on 27 Nov 2021

    The ruling also comes amid calls from an opposition party for a review of the royal insult law, which would have been unthinkable just a few years ago.

    2021 November 10, Panarat Thepgumpanat, Chayut Setboonsarng, “Thai court rules students' royal reform call sought to overthrow monarchy”, in Reuters, Reuters, archived from the original on 26 Mar 2022, retrieved 10 Nov 2021

    It reopened as St Pancras Renaissance Hotel London in the early part of this century, and it now seens unthinkable to demolish such a structure.

    2023 August 23, Dr Joseph Brennan, “Check out Britain's famous station hotels: St Pancras”, in RAIL, number 990, page 61

    Synonyms: inconceivable, imponderable

  3. Extremely improper; extremely at odds with norms of expected behavior.

    Near-synonyms: taboo, unspeakable, unutterable, inconceivable

    1 more example

    I want you to know that P.A.C. will pay for a child psychiatrist to come in and testify on behalf of the child so that the homosexual father will not be able to have that little girl overnight and weekends to expose her to what is unthinkable.

    1980 December 20, Von Carswell, quotee, “Still At It”, in Gay Community News, volume 8, number 22, page 2

    Synonyms: taboo, unspeakable, unutterable, inconceivable

noununthinkable (countable and uncountable, plural unthinkables)

countable uncountable · plural unthinkables

  1. Something, or various things collectively, that one dares not think about or do.

    do the unthinkable

    2 more examples

    Near-synonym: unspeakable

    did the unthinkable

    Synonyms: unspeakable

Synonyms & antonyms

adjectiveThat cannot be believed.

adjectiveInconceivable or unimaginable; extremely improbable in a way that goes against common sense.

adjectiveExtremely improper; extremely at odds with norms of expected behavior.

nounSomething, or various things collectively, that one dares not think about or do.

More synonyms by meaning

adjectiveincapable of being conceived or considered

Opposite

Synonym sets from Open English WordNet, CC BY 4.0.

Origin

  1. Proto-Indo-European*né
  2. Proto-Indo-European*n̥-
  3. Proto-Germanic*un-
  4. Proto-West Germanic*un-
  5. Old Englishun-
  6. Middle Englishun-
  7. Englishun-
  8. Proto-Indo-European*teng-
  9. Proto-Germanic*þankijaną
  10. Proto-West Germanic*þankijan
  11. Old Englishþenċan
  12. Middle Englishthinken
  13. Englishthink
  14. Englishunthinkable

From un- + think + -able.

Full word history & related roots →

Translations

Arabic لَا يَخْطُرُ عَلَى الْبَالِ, لَا يَخْطُرُ عَلَى الْبَالِ
  • لَا يَخْطُرُ عَلَى الْبَالِ (lā yaḵṭuru ʕalā l-bāli)incapable of being believed; incredible
  • لَا يَخْطُرُ عَلَى الْبَالِ (lā yaḵṭuru ʕalā l-bāli)inconceivable or unimaginable; extremely improbable in a way that goes against common sense
Bulgarian немислим, невероятен
  • немислим (nemislim)incapable of being believed; incredible
  • невероятен (neverojaten)inconceivable or unimaginable; extremely improbable in a way that goes against common sense
Catalan impensable, impensable
  • impensableincapable of being believed; incredible
  • impensableinconceivable or unimaginable; extremely improbable in a way that goes against common sense
Danish utænkelig, utrolig
  • utænkeligincapable of being believed; incredible
  • utroligincapable of being believed; incredible
  • utænkeliginconceivable or unimaginable; extremely improbable in a way that goes against common sense
Dutch ondenkbaar
  • ondenkbaarincapable of being believed; incredible
Esperanto nepensebla
  • nepenseblainconceivable or unimaginable; extremely improbable in a way that goes against common sense
Finnish uskomaton, käsittämätön
  • uskomatonincapable of being believed; incredible
  • käsittämätönincapable of being believed; incredible
  • käsittämätöninconceivable or unimaginable; extremely improbable in a way that goes against common sense
French incroyable, inconcevable
  • incroyableincapable of being believed; incredible
  • inconcevableinconceivable or unimaginable; extremely improbable in a way that goes against common sense
  • impensableinconceivable or unimaginable; extremely improbable in a way that goes against common sense
  • inimaginableinconceivable or unimaginable; extremely improbable in a way that goes against common sense
German unvorstellbar, undenkbar
  • unvorstellbarincapable of being believed; incredible
  • undenkbarinconceivable or unimaginable; extremely improbable in a way that goes against common sense
  • unvorstellbarinconceivable or unimaginable; extremely improbable in a way that goes against common sense
Greek αδιανόητος
  • αδιανόητος (adianóitos)inconceivable or unimaginable; extremely improbable in a way that goes against common sense
Hindi कल्पनातीत, अकल्पनीय
  • कल्पनातीत (kalpanātīt)incapable of being believed; incredible
  • अकल्पनीय (akalpanīya)incapable of being believed; incredible
  • अकल्पनीय (akalpanīya)inconceivable or unimaginable; extremely improbable in a way that goes against common sense
  • कल्पनातीत (kalpanātīt)inconceivable or unimaginable; extremely improbable in a way that goes against common sense
Hungarian hihetetlen, elképzelhetetlen
  • hihetetlenincapable of being believed; incredible
  • elképzelhetetleninconceivable or unimaginable; extremely improbable in a way that goes against common sense
Italian impensabile
  • impensabileincapable of being believed; incredible
Korean 상상도 할 수 없는
  • 상상도 할 수 없는 (sangsang-do hal su eomneun)incapable of being believed; incredible
Latin incōgitābilis
  • incōgitābilisinconceivable or unimaginable; extremely improbable in a way that goes against common sense
Norwegian Bokmål utenkelig
  • utenkeliginconceivable or unimaginable; extremely improbable in a way that goes against common sense
Polish niewiarygodne
  • niewiarygodneincapable of being believed; incredible
Portuguese impensável, impensável
  • impensávelincapable of being believed; incredible
  • impensávelinconceivable or unimaginable; extremely improbable in a way that goes against common sense
Romanian neimaginabil, de neimaginat
  • neimaginabilincapable of being believed; incredible
  • de neimaginatincapable of being believed; incredible
  • incredibilincapable of being believed; incredible
  • negândibilincapable of being believed; incredible
  • imposibilincapable of being believed; incredible
  • de neconceputinconceivable or unimaginable; extremely improbable in a way that goes against common sense
  • inconceptibilinconceivable or unimaginable; extremely improbable in a way that goes against common sense
  • inimaginabilinconceivable or unimaginable; extremely improbable in a way that goes against common sense
  • neimaginabilinconceivable or unimaginable; extremely improbable in a way that goes against common sense
Russian немы́слимый, немы́слимый
  • немы́слимый (nemýslimyj)incapable of being believed; incredible
  • немы́слимый (nemýslimyj)inconceivable or unimaginable; extremely improbable in a way that goes against common sense
Spanish impensable
  • impensableinconceivable or unimaginable; extremely improbable in a way that goes against common sense
Swedish otänkbar, otänkbar
  • otänkbarincapable of being believed; incredible
  • otänkbarinconceivable or unimaginable; extremely improbable in a way that goes against common sense
Turkish düşünülemez, düşünülemez
  • düşünülemezincapable of being believed; incredible
  • düşünülemezinconceivable or unimaginable; extremely improbable in a way that goes against common sense
  • kavranılamazinconceivable or unimaginable; extremely improbable in a way that goes against common sense
Cite this entry
APA

unthinkable. (n.d.). In WatkinsX Dictionary. Retrieved November 2, 2026, from https://dictionary.watkinsx.com/word/unthinkable

MLA

“unthinkable.” WatkinsX Dictionary, https://dictionary.watkinsx.com/word/unthinkable. Accessed November 2, 2026.

Chicago

WatkinsX Dictionary, s.v. “unthinkable,” accessed November 2, 2026, https://dictionary.watkinsx.com/word/unthinkable.

Source: unthinkable on Wiktionary, CC BY-SA 4.0.