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B2 adjective 11 min read

improbable

Examples
Explanation improbable in your Level:
At the A1 level, you are just starting to learn how to express basic ideas. 'Improbable' might be a bit long, but you can think of it as the opposite of 'probable'. If you want to say something is not going to happen, you usually say 'non' or 'pas possible'. However, learning 'improbable' early helps you understand that in French, many words look like English words. You can use it simply by saying 'C'est improbable' (It is unlikely). At this stage, don't worry about complex grammar. Just remember that it describes something that is very, very unlikely to happen, like winning the lottery or seeing a penguin in the desert. It is an adjective, so it describes a thing or a situation. You can use it after 'est' (is). For example: 'Le film est improbable.' This means the movie's story is hard to believe. Even at A1, knowing this word makes you sound more advanced than just using 'pas'. It is a good word to recognize when you read short texts or listen to simple dialogues. Remember, it sounds like 'im-pro-bab-luh'. Practice saying it slowly. It is a 'cognate', which means it is almost the same in English and French, making it easy to memorize!
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At the A2 level, you can begin to use 'improbable' to describe events in your daily life or stories you hear. You already know how to use 'parce que' (because) and 'mais' (but), so you can start to justify why something is improbable. For example: 'C'est improbable parce qu'il fait trop froid' (It is improbable because it is too cold). You should also notice that 'improbable' does not change if the noun is masculine or feminine. 'Un voyage improbable' (masculine) and 'Une histoire improbable' (feminine) both use the same form. This makes it a very 'safe' adjective to use without worrying too much about gender agreement. However, if you are talking about more than one thing, you must add an 's' at the end: 'des résultats improbables'. You might hear this word in weather reports or when people talk about sports. If a very weak team is playing against a very strong team, you can say 'Leur victoire est improbable'. This shows you understand degrees of possibility. It's a step up from 'impossible'. You are starting to see that life isn't just 'yes' or 'no', but has many levels of 'maybe'.
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At the B1 level, you are expected to express your opinions and describe your hopes and doubts. 'Improbable' becomes a very useful tool for this. You can start using it in the middle of sentences to add nuance. For instance, 'J'ai lu une nouvelle tout à fait improbable dans le journal' (I read a completely improbable news item in the paper). At this level, you should also be aware of the impersonal construction 'Il est improbable que...'. While the subjunctive mood is a B1/B2 topic, you can start practicing it with this word. 'Il est improbable qu'il vienne à la fête' (It is unlikely he will come to the party). You are also learning more synonyms, so you can compare 'improbable' with 'difficile' or 'incertain'. You might use 'improbable' to talk about your future plans if they depend on something lucky. 'Il est improbable que je gagne, mais je vais essayer'. This word helps you move away from simple sentences and towards more complex, adult-like conversation. You can also use it to describe people's behavior if they do something very out of character. 'Son départ soudain était improbable'. This shows you can use the word in an abstract way, not just for physical events.
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At the B2 level, which is where 'improbable' is officially categorized, you should use this word with precision and confidence. You understand that 'improbable' is a key part of expressing uncertainty and skepticism, which are very common in French culture. You should consistently use the subjunctive mood after 'Il est improbable que...'. For example, 'Il est improbable que le gouvernement puisse résoudre ce problème sans réformes majeures'. You are also expected to recognize the word in different registers. In a formal essay, you might use it to discuss a hypothesis: 'Cette théorie semble improbable au vu des données récentes'. In a casual conversation, you might use it to describe a 'weird' or 'random' situation: 'On s'est retrouvés dans un bar improbable au bout du monde'. You should also be able to distinguish 'improbable' from its close relative 'invraisemblable'. You know that 'improbable' relates more to the odds of an event, while 'invraisemblable' relates to how believable a story or excuse is. At B2, you should also be comfortable using adverbs to modify the word, such as 'hautement improbable' or 'fort improbable'. This shows you have a command over the intensity of your expressions.
At the C1 level, you are mastering the finer points of the French language. 'Improbable' is no longer just a vocabulary word; it's a tool for stylistic expression. You can use it to create litotes (understatements) by saying 'Il n'est pas improbable que...' to mean 'It is quite likely, actually'. This is a very French way of speaking that shows sophistication and a bit of irony. You might also use the noun form 'improbabilité' in complex arguments: 'L'improbabilité statistique de cet événement suggère une intervention extérieure'. You can use the word in literary analyses to describe the 'deus ex machina' or 'unlikely' plot twists in a novel. Your pronunciation should be perfect, with a clear nasal 'im-' and a natural flow. You are also aware of the word's history and its Latin roots, which helps you understand its use in legal or philosophical texts. You can participate in high-level debates about probability, risk, and chance, using 'improbable' to dismiss weak arguments or to highlight the uniqueness of a situation. You might also explore the use of the word in different French-speaking regions, noting any slight variations in colloquial usage.
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At the C2 level, you have a near-native command of the word 'improbable'. You can use it with total spontaneity in any context, from a scientific symposium to a late-night talk show. You understand the philosophical implications of the 'improbable'—how it relates to the concept of the 'absurd' in the works of Albert Camus or the 'randomness' in modern physics. You can use the word to create subtle humor or to express deep skepticism without being blunt. You might use it in complex sentence structures with multiple subordinate clauses, never losing track of the required subjunctive or the proper agreement. You are also familiar with rare or archaic uses of the word in classical French literature. You can discuss the 'esthétique de l'improbable' (the aesthetics of the improbable) in surrealist art or experimental cinema. For you, 'improbable' is just one note in a vast symphony of words that you use to describe the complexity of the world. You can effortlessly switch between the literal meaning (low probability) and the figurative meaning (strange/bizarre), and you can even play with the word's sounds in creative writing or poetry.
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Examples
The French adjective improbable is a sophisticated yet common term used to describe events, situations, or explanations that lack a high degree of likelihood. While its English cognate 'improbable' is often reserved for formal or scientific contexts, the French counterpart enjoys a broader range of usage, stretching from rigorous statistical analysis to casual exclamations of disbelief in a café. At its core, the word is formed by the prefix im- (not) and the adjective probable (likely), rooted in the Latin improbabilis. In French thought, something improbable is not necessarily impossible; rather, it exists in that fascinating gray area where reality defies expectation. You will encounter this word frequently when discussing weather forecasts, political outcomes, or even the strange coincidences of daily life. For instance, if a friend tells you they met a famous actor while hiking in a remote forest, you might respond with a skeptical 'C'est improbable !' to indicate that while you don't think they are lying, the odds of such an encounter seem incredibly low. In literature and philosophy, the term often surfaces when discussing the absurdity of existence or the randomness of the universe. It is a key word for CEFR B2 learners because it allows for a more nuanced expression of doubt than the simpler 'pas possible' or 'incertain'. Understanding 'improbable' requires recognizing that it addresses the vraisemblance (likelihood) of a claim.
Statistical Context
In mathematics and science, it refers to a low probability coefficient, often quantified as approaching zero but never reaching it.
Colloquial Context
In everyday speech, it is used to describe something surreal, bizarre, or 'out there', similar to how an English speaker might say 'unheard of' or 'random'.

Il est tout à fait improbable que nous trouvions une solution avant ce soir sans aide extérieure.

Une rencontre improbable au milieu de nulle part a changé le cours de sa vie entière.

Synonymy Nuance
Unlike 'impossible', which denotes a 0% chance, 'improbable' suggests a 1% to 10% chance—enough to be surprising if it happens, but not a violation of natural laws.

Le scénario de ce film est tellement improbable qu'il en devient comique.

Porter des chaussettes avec des sandales est un choix stylistique improbable.

Usage frequency
It appears in the top 2000 most frequent words in contemporary French literature and news media.

Il a invoqué une excuse improbable pour justifier son retard de trois heures.

To master this word, one must appreciate the French love for skepticism; by calling something improbable, you are inviting a debate on its feasibility or questioning the logic behind it.
Using improbable correctly in French involves understanding both its grammatical positioning and its impact on verb moods. As an adjective, it is invariable in gender (it ends in 'e', so the masculine and feminine forms are identical) but must agree in number with the noun it modifies (adding an 's' for plural). Most commonly, you will find it following the noun it describes, such as in 'un événement improbable' (an improbable event) or 'des circonstances improbables' (improbable circumstances). However, its most potent use often occurs in impersonal constructions like 'Il est improbable que...' This specific structure is a classic trigger for the subjunctive mood because it expresses a high degree of doubt or uncertainty. For example, 'Il est improbable qu'il vienne' (It is improbable that he will come). Note how 'vienne' is the subjunctive form of 'venir'. If you were to use 'probable', you might use the indicative in some contexts, but 'improbable' almost always demands the subjunctive. Beyond these formal structures, 'improbable' can function as a predicate adjective following state verbs like 'être', 'sembler', or 'paraître'. For instance, 'Sa victoire semblait improbable dès le début de la course' (His victory seemed improbable from the start of the race).
Noun Placement
Generally follows the noun: 'un succès improbable'. Placing it before the noun is rare and usually reserved for poetic or highly stylized prose.
Adverbial Modification
Often paired with adverbs of degree: 'fort improbable' (highly improbable), 'totalement improbable' (totally improbable), or 'assez improbable' (rather improbable).

Les experts jugent ce scénario improbable dans le climat actuel.

Il nous a raconté une histoire improbable de voyage dans le temps.

Negative Constructions
While 'pas improbable' (not improbable) is used, it is a double negative that usually means 'somewhat likely' or 'possible'. It is a common rhetorical device known as litotes.

Il n'est pas improbable que les taux d'intérêt baissent l'année prochaine.

Ce sont des alliés improbables réunis par une cause commune.

Comparative/Superlative
Use 'plus improbable' (more improbable) or 'le plus improbable' (the most improbable). 'C'est la chose la plus improbable que j'aie jamais vue.'

Leur amitié est devenue de plus en plus improbable avec le temps.

By integrating 'improbable' into your repertoire, you move beyond binary thinking (true/false, yes/no) and start communicating with the subtlety expected of an upper-intermediate speaker.
To truly grasp 'improbable', you must look at its presence across various domains of French life. In the realm of journalism and politics, it is a staple. News anchors often use it when discussing electoral upsets or diplomatic breakthroughs that were not anticipated by polls. You might hear: 'Une alliance improbable entre la gauche et la droite a été formée' (An improbable alliance between the left and the right was formed). In the scientific and financial sectors, it appears in reports regarding risk assessment. A financial analyst might describe a market crash as an 'événement improbable mais catastrophique' (an improbable but catastrophic event), similar to the 'Black Swan' theory. In French cinema and literature, 'improbable' is often used to critique the realism of a plot. A critic might write that the protagonist's survival was 'totalement improbable', suggesting a flaw in the narrative's logic. Perhaps most interestingly, the word has seen a surge in casual, urban French. Younger generations use it as a synonym for 'weird', 'absurd', or 'unlikely' in a humorous sense. If someone wears a neon green tuxedo to a funeral, a witness might whisper, 'C’est quoi ce costume improbable ?' (What is this improbable suit?). This usage highlights a shift from literal probability to a subjective sense of 'this shouldn't exist'.
TV News
Used to describe unexpected weather patterns or sudden political shifts.
Social Media
Often found in captions for 'fail' videos or strange coincidences: '#momentimprobable'.

La météo annonce un orage de neige, ce qui est improbable en plein mois d'août.

J'ai trouvé cet objet improbable dans le grenier de ma grand-mère.

Radio Debats
Intellectuals use it to dismiss arguments that lack logical consistency: 'Votre hypothèse est improbable'.

C'était une rencontre improbable entre deux mondes que tout opposait.

L'équipe a réussi un retour improbable dans les dernières minutes du match.

Legal Language
Lawyers might argue that a witness's version of events is 'intrinsèquement improbable' (inherently improbable) to cast doubt on their testimony.

Il est improbable que la preuve soit recevable devant le tribunal.

Whether you are listening to a podcast on philosophy or eavesdropping on a conversation in a Parisian metro station, 'improbable' serves as a linguistic marker for anything that breaks the rhythm of the expected.
One of the primary pitfalls for English speakers using improbable is the confusion between 'improbable' and 'impossible'. In English, we sometimes use them interchangeably in hyperbole, but in French, the distinction is more strictly observed. Calling something 'impossible' means it cannot happen, whereas 'improbable' means it could happen, but the odds are against it. Using 'impossible' when you mean 'improbable' can make you sound overly dramatic or factually incorrect. Another major error involves the subjunctive mood. Many learners forget that 'Il est improbable que...' requires the subjunctive. Saying 'Il est improbable qu'il *est* là' is a common mistake; the correct form is 'Il est improbable qu'il *soit* là'. Furthermore, word order can be tricky. While many adjectives in French can go before or after the noun, 'improbable' almost always follows the noun. Saying 'un improbable événement' sounds archaic or translated directly from English; 'un événement improbable' is the standard. There is also a tendency to over-nasalize or under-nasalize the 'im-' prefix. It should sound like the 'in' in 'interdit', not like the 'im' in the English 'improbable'. Finally, learners often struggle with the preposition that follows the noun form 'improbabilité'. It is 'l'improbabilité de [quelque chose]', not 'pour'.
The Subjunctive Trap
Mistake: 'Il est improbable qu'il pleuvra.' (Indicative future). Correct: 'Il est improbable qu'il pleuve.' (Subjunctive present).
Confusion with 'Inimaginable'
'Inimaginable' means you can't even conceive of it. 'Improbable' means you can conceive of it, but it's unlikely.

Dire que c'est improbable ne veut pas dire que c'est impossible.

C'est une erreur improbable pour un professionnel de son calibre.

Gender Agreement
Don't try to add an extra 'e' for feminine. 'Improbable' is already 'e-ending'. 'Une issue improbable' is correct as is.

L'idée que le chat ait ouvert la porte tout seul est improbable.

Il a une collection improbable de vieux tickets de bus.

Pluralization
Always add the 's' in plural: 'Des résultats improbables'. Missing the 's' in writing is a common B1/B2 level mistake.

Ces deux événements improbables se sont produits le même jour.

Avoiding these mistakes will make your French sound more natural and precise, reflecting a deeper understanding of the language's logical structure.
To enrich your vocabulary, it is helpful to look at words that orbit the same meaning as improbable. The most direct synonym is invraisemblable. While 'improbable' focuses on the statistical likelihood, 'invraisemblable' focuses on the 'truth-seemingness' or credibility of a story. If a story sounds like a lie because it's so far-fetched, 'invraisemblable' is the better choice. Another alternative is incroyable (unbelievable), which is often used more positively or with more emotion than the neutral 'improbable'. For something that is just doubtful, you might use douteux. If you want to emphasize that something is unexpected, inattendu or imprévu are excellent choices. In a more formal or literary context, aléatoire (random/uncertain) might be used when discussing outcomes. On the opposite side, the antonyms are probable, vraisemblable, and certain. Understanding these nuances allows you to choose the exact 'flavor' of uncertainty you wish to convey.
Improbable vs. Invraisemblable
'Improbable' is about odds; 'Invraisemblable' is about whether a story 'looks true'. A lottery win is improbable but not invraisemblable.
Improbable vs. Inattendu
'Inattendu' simply means it wasn't expected. Something can be probable but still inattendu if you weren't paying attention.

Son explication est invraisemblable, personne ne le croira.

Il est peu probable qu'il change d'avis maintenant.

Formal Alternatives
'Hypothétique' (hypothetical) or 'conjectural' (conjectural) can be used in academic writing to describe improbable theories.

La réussite de ce projet reste aléatoire vu le manque de fonds.

C'est un mélange insolite de saveurs, mais ça marche !

Degree of Certainty
Impossible < Improbable < Incertain < Possible < Probable < Certain.

Une telle coïncidence est exceptionnelle et presque unique.

By exploring these synonyms, you can tailor your speech to be more descriptive and precise, which is the hallmark of a B2/C1 level learner.
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Examples by Level

1

C'est un film improbable.

It is an unlikely movie.

Simple adjective use after 'est'.

2

Il est improbable qu'il neige.

It is unlikely that it snows.

Impersonal construction 'Il est...'

3

Un résultat improbable.

An unlikely result.

Adjective follows the noun.

4

C'est improbable, non ?

It's unlikely, right?

Tag question with 'non'.

5

Une rencontre improbable.

An unlikely meeting.

Feminine noun, but adjective stays the same.

6

Le plan est improbable.

The plan is unlikely.

Predicate adjective.

7

C'est une idée improbable.

It's an unlikely idea.

Adjective after feminine noun.

8

Rien n'est improbable.

Nothing is improbable.

Negative 'Rien... ne'.

1

Il est improbable qu'il pleuve aujourd'hui.

It is unlikely that it rains today.

Use of subjunctive 'pleuve'.

2

J'ai vu des animaux improbables au zoo.

I saw unlikely animals at the zoo.

Plural agreement: 'improbables'.

3

Cette histoire me semble improbable.

This story seems unlikely to me.

Verb 'sembler' with adjective.

4

C'est un mélange de couleurs improbable.

It's an unlikely mix of colors.

Noun + prepositional phrase + adjective.

5

Il est improbable de gagner le gros lot.

It is unlikely to win the jackpot.

'Il est improbable de' + infinitive.

6

Une amitié improbable entre un chien et un lion.

An unlikely friendship between a dog and a lion.

Common descriptive phrase.

7

Sa réponse était totalement improbable.

His answer was totally unlikely.

Adverbial modification with 'totalement'.

8

Nous avons trouvé un endroit improbable pour dormir.

We found an unlikely place to sleep.

Adjective describing 'endroit'.

1

Il est fort improbable que nous finissions à temps.

It is highly unlikely that we finish on time.

Adverb 'fort' meaning 'very'.

2

Elle porte toujours des chapeaux improbables.

She always wears unlikely hats.

Plural adjective agreement.

3

L'issue de la négociation reste improbable.

The outcome of the negotiation remains unlikely.

Verb 'rester' + adjective.

4

C'est une coïncidence vraiment improbable.

It's a truly unlikely coincidence.

Use of 'vraiment' for emphasis.

5

Il a invoqué une raison improbable pour son absence.

He cited an unlikely reason for his absence.

Verb 'invoquer'.

6

Il est improbable qu'elle ait oublié notre rendez-vous.

It is unlikely that she forgot our meeting.

Past subjunctive 'ait oublié'.

7

Leur succès est improbable sans aide financière.

Their success is unlikely without financial help.

Prepositional phrase 'sans...'.

8

On a découvert un objet improbable dans le jardin.

We discovered an unlikely object in the garden.

Indefinite pronoun 'on'.

1

Il est statistiquement improbable que cela se reproduise.

It is statistically unlikely that this happens again.

Adverb 'statistiquement'.

2

Le scénario du film était parsemé de rebondissements improbables.

The movie script was filled with unlikely twists.

Plural adjective modifying 'rebondissements'.

3

Bien que ce soit improbable, nous devons nous préparer.

Although it is unlikely, we must prepare ourselves.

Conjunction 'bien que' + subjunctive.

4

Il s'est retrouvé dans une situation tout à fait improbable.

He found himself in a completely unlikely situation.

Pronominal verb 'se retrouver'.

5

L'hypothèse d'une vie extraterrestre n'est pas improbable.

The hypothesis of alien life is not unlikely.

Double negative 'n'est pas improbable'.

6

Il a fallu un concours de circonstances improbables pour en arriver là.

It took a series of unlikely circumstances to get here.

Noun phrase 'concours de circonstances'.

7

Elle a un talent pour dénicher des vêtements improbables.

She has a talent for finding unlikely clothes.

Infinitive 'dénicher'.

8

Il est improbable qu'il puisse rembourser sa dette cette année.

It is unlikely that he can pay back his debt this year.

Subjunctive 'puisse'.

1

L'improbabilité de son récit a immédiatement éveillé les soupçons.

The unlikelihood of his story immediately raised suspicions.

Noun form 'improbabilité'.

2

C'était un mariage improbable entre la tradition et la modernité.

It was an unlikely marriage between tradition and modernity.

Metaphorical use of 'mariage'.

3

Juger un événement comme improbable est souvent subjectif.

Judging an event as unlikely is often subjective.

Gerund-like use of 'Juger'.

4

Il cultive un style improbable qui défie toutes les modes.

He cultivates an unlikely style that defies all fashions.

Relative clause 'qui défie...'

5

La survie du manuscrit à travers les siècles est hautement improbable.

The survival of the manuscript through the centuries is highly unlikely.

Adverb 'hautement'.

6

Rien n'est plus improbable que la vérité elle-même.

Nothing is more unlikely than the truth itself.

Comparative 'plus... que'.

7

On ne peut ignorer cette éventualité, aussi improbable soit-elle.

We cannot ignore this possibility, however unlikely it may be.

Concessive clause 'aussi... soit-elle'.

8

Le film explore les trajectoires improbables de trois inconnus.

The movie explores the unlikely paths of three strangers.

Noun 'trajectoires'.

1

L'œuvre se complaît dans une esthétique de l'improbable et du bizarre.

The work delights in an aesthetic of the unlikely and the bizarre.

Noun phrase 'esthétique de l'improbable'.

2

Il est ontologiquement improbable que le néant puisse engendrer l'être.

It is ontologically unlikely that nothingness can generate being.

Philosophical adverb 'ontologiquement'.

3

L'auteur manie l'improbable avec une dextérité déconcertante.

The author handles the unlikely with disconcerting dexterity.

Using adjective as a noun 'l'improbable'.

4

Une telle convergence d'intérêts divergents demeure improbable.

Such a convergence of divergent interests remains unlikely.

Formal verb 'demeurer'.

5

La théorie, bien que séduisante, pèche par son caractère improbable.

The theory, though attractive, fails due to its unlikely character.

Phrase 'pèche par'.

6

Il n'est guère improbable que les paradigmes actuels soient renversés.

It is hardly unlikely that current paradigms will be overturned.

Negative adverb 'guère'.

7

Le destin l'a conduit vers des rivages improbables.

Fate led him toward unlikely shores.

Literary metaphor.

8

L'improbable devient la norme dans cet univers dystopique.

The unlikely becomes the norm in this dystopian universe.

Conceptual noun use.

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