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improbable

improbable

53 4.9
Not likely to happen or be true
  • adjective
  • /ɪmˈprɑːbəbl/
translation icon : improbable
  • Winning the lottery is an improbable event for most people.
  • highly improbable
  • seem improbable
  • an improbable event

And although they seem improbable, they are improbable, in fact, impossible in one step.

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Examples

  • Improbable, unlikely, but never impossible.

  • The universe as it presents itself to us is highly improbable, is highly unlikely.

  • So getting on top of this thing seems like really, really hard and improbable for one young woman, at least without help.

  • The one thing to say about it was a highly improbable outcome.

  • The thought that that could be done fairly and properly in a few days is improbable in the extreme.

  • You're an improbable person, Eve, and so am I.

  • But any other explanation seemed even more improbable than the one Rhoodie had given him.

    Fiction book (1992)
  • Significant, though not revolutionary, democratization in Africa may be improbable, but is not necessarily impossible.

    Academic text (1993)
  • The legislation was an impressive, perhaps even improbable, achievement, passed in an era of intense political polarization.

    Academic text (2011)
  • It seems improbable that they will finish the project on time without any assistance.

Synonyms

unlikely
vsimprobable
487 1.9

People do not expect it to happen or be true

expresses not likely to be true or to happen in general
unbelievable
vsimprobable
432 4.9

Very surprising and almost impossible to accept as true

states low likelihood without suggesting surprise or astonishment
remote
vsimprobable
162 5.0

Very unlikely to happen

says something is not likely without implying a very low chance
implausible
vsimprobable
26 7.0

Not likely to be true or hard to believe

focuses on lack of likelihood rather than seeming unreasonable

Antonyms

200 3.4

Likely to happen or be true but not certain

How Likely

certain
946 1.0
likely
1.0
possible
1.0
improbable
53 4.9
impossible
1.4

Surface Forms

improbable positive
improbabler comparative
improbablest superlative

Morphology

improbable = probable (transparent) = im + probable

Standard negative prefix 'im-' added to the adjective 'probable' yields a straightforward negation 'not likely', which learners can infer.

Etymology

The word improbable is made of in- meaning 'not' and prob meaning 'to prove', the same part you see in prove. So something improbable is 'not provable' and 'not likely to be true or to happen'.