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A2 verb 10 min read

s'affaiblir

Examples
Explanation s'affaiblir in your Level:
At the A1 level, you should know that 's'affaiblir' means 'to get weak.' You might not use it often yourself, but you will see it in simple stories or health descriptions. It comes from the word 'faible' (weak). Think of it like being very tired. When you are sick, your body 's'affaiblit.' Remember that it has a 'se' in front of it because it's something happening to you or the subject. You use 'être' when talking about the past. For example: 'Il s'est affaibli' (He got weak). It's a regular '-ir' verb, so it follows the same patterns as 'finir' (to finish). Focus on the basic meaning: losing strength. If a light is getting dim, it is 's'affaiblit.' If a sound is getting quiet, it 's'affaiblit.' It is a useful word to describe how things change over time from strong to weak. Don't worry about the complex grammar yet; just recognize the root 'faible' inside the word and you will always know what it means.
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At the A2 level, you can start using 's'affaiblir' to describe physical states and weather. You should be comfortable with its present tense conjugation: je m'affaiblis, tu t'affaiblis, il s'affaiblit, nous nous affaiblissons, vous vous affaiblissez, ils s'affaiblissent. Notice the '-iss-' in the plural forms; this is typical for second-group verbs. You can use it to talk about the wind (le vent s'affaiblit) or a battery (la batterie s'affaiblit). It is important to distinguish it from the adjective 'faible.' While 'faible' describes a state (He is weak), 's'affaiblir' describes the process (He is getting weaker). In the passé composé, remember to agree the past participle: 'Elle s'est affaiblie' (with an 'e'). This level is about moving from simple adjectives to verbs that show change. You will hear this word in weather reports or when people talk about their health during a cold or the flu. It's a step up from 'être fatigué' because it describes a loss of power, not just a feeling.
At the B1 level, you should expand your use of 's'affaiblir' to abstract concepts like the economy, politics, and relationships. You might say 'L'économie s'affaiblit' (The economy is weakening) or 'Leur amitié s'affaiblit' (Their friendship is growing weaker). You should also understand the difference between the reflexive 's'affaiblir' and the transitive 'affaiblir.' For example, 'Le manque de sommeil affaiblit le système immunitaire' (Lack of sleep weakens the immune system) vs. 'Le système immunitaire s'affaiblit' (The immune system is weakening). You are expected to use various tenses, including the imparfait (La lumière s'affaiblissait) and the futur simple (Sa position s'affaiblira). Pay attention to the double 'f' in spelling. This word is very common in B1 listening materials like news clips or radio interviews. It's a key verb for discussing trends and changes in intensity. You can also start using it to describe sounds or signals, like a Wi-Fi signal fading as you move away from the source.
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At the B2 level, you should be able to use 's'affaiblir' with nuance, choosing it over synonyms like 'faiblir' or 'diminuer' when appropriate. You should understand that 's'affaiblir' implies a loss of internal strength or structural integrity. You can use it in formal arguments or essays to describe the decline of an institution or the fading of an idea. For example, 'L'influence culturelle de ce pays s'affaiblit sur la scène internationale.' You should be comfortable with the agreement of the past participle in complex sentences, such as those involving the subjunctive: 'Il est possible que ses forces se soient affaiblies.' You will also encounter it in more literary contexts, where it might be used to describe emotions or moral resolve. At this level, you should recognize that 's'affaiblir' is a neutral to formal term, and you can use it to add precision to your descriptions of gradual decline. You should also be aware of related nouns like 'affaiblissement' (weakening) and how they function in a sentence.
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At the C1 level, 's'affaiblir' becomes a tool for precise academic and literary expression. You should be able to analyze its use in classical French literature and modern sociological texts. You will understand its metaphorical weight—how a 'pouvoir qui s'affaiblit' suggests a shift in the balance of power. You should be able to use it in the 'passé simple' (il s'affaiblit, ils s'affaiblirent) when writing formal narratives. You will also distinguish it from highly specific synonyms like 's'étioler' (to waste away/lose vitality) or 'péricliter' (to be in a state of terminal decline). You can use 's'affaiblir' to describe the subtle loss of intensity in an argument or the gradual erosion of a legal principle. Your usage should reflect an understanding of the verb's pronominal nature and its impact on sentence structure. For instance, using the gerund 'en s'affaiblissant' to show simultaneous actions: 'En s'affaiblissant, le régime a ouvert la porte à la révolution.' You should also be aware of its technical uses in physics or engineering to describe signal attenuation.
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At the C2 level, you have a complete mastery of 's'affaiblir' and its place within the vast web of French verbs of decline. You can use it with effortless precision in philosophical or high-level political discourse. You understand the subtle rhythmic and stylistic effects of choosing 's'affaiblir' over other verbs in a long, complex sentence. You can manipulate the verb in all moods and tenses, including the most obscure ones, and you understand its etymological roots and how they connect it to other words in the Romance family. You can use it to describe the most abstract phenomena, such as the 'affaiblissement de la volonté' in a Nietzschean sense or the 'affaiblissement du sens' in semiotics. You are capable of identifying when 's'affaiblir' is used ironically or as a euphemism in diplomatic language. Your command of the word allows you to use it not just to convey information, but to evoke specific tones—whether clinical, tragic, or purely observational. You also recognize its role in fixed idioms and can invent your own metaphors using the verb that sound natively authentic.
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Examples

The French verb s'affaiblir is a pronominal verb of the second group, derived from the adjective faible (weak). At its most fundamental level, it translates to "to become weaker," "to grow faint," or "to diminish in strength." Unlike the transitive version affaiblir (to weaken something else), the reflexive s'affaiblir focuses on the subject itself undergoing the process of losing power, intensity, or vitality. This distinction is crucial for English speakers who might use "weaken" for both active and passive contexts. In French, if the subject is the one losing strength, the reflexive pronoun se (or m', t', s', nous, vous) is mandatory.

Physical Health
It describes a person losing physical strength due to illness, age, or exhaustion. It implies a gradual process rather than a sudden collapse.

Avec l'âge, ses muscles commencent à s'affaiblir légèrement.

Abstract Concepts
This verb is frequently used in economic, political, or social contexts. An economy can s'affaiblir (slow down/lose value), a political party can s'affaiblir (lose influence), or a bond between people can s'affaiblir (become less intense).

The verb carries a nuance of internal decay or external pressure leading to a reduction in capacity. In a business setting, you might hear about a company's market position s'affaiblissant due to competition. In a romantic novel, you might read about a character's resolve s'affaiblissant under the gaze of a lover. It is a versatile word that bridges the gap between the purely physiological and the highly metaphorical. Its usage is extremely common in news broadcasts (especially financial reports) and medical discussions.

Le signal Wi-Fi s'affaiblit quand on s'éloigne du routeur.

Environmental Usage
Used to describe the fading of sounds, lights, or weather patterns. It suggests a tapering off of energy.

Historically, the word has maintained a very stable meaning. It implies a loss of the qualities that make something 'fort' (strong). Because it is a reflexive verb, the focus is always on the change of state of the subject. If you say 'La monnaie s'affaiblit', you are focusing on the currency itself losing value. If you say 'L'inflation affaiblit la monnaie', you are using the non-reflexive version to show that inflation is the cause of the weakening. This grammatical flexibility allows French speakers to be very precise about agency and effect.

L'influence de cet empire a commencé à s'affaiblir au XVIIIe siècle.

Ma voix s'affaiblit car j'ai trop parlé aujourd'hui.

Using s'affaiblir correctly requires an understanding of second-group verb conjugations and reflexive pronoun placement. As an '-ir' verb, it follows the pattern of finir or choisir, characterized by the '-iss-' infix in the plural forms (e.g., nous nous affaiblissons). This makes it feel regular and predictable for learners, though the double 'f' and the reflexive nature add a layer of complexity for beginners.

Present Tense
Standard usage involves the pronoun matching the subject. 'Je m'affaiblis' (I am getting weaker), 'Ils s'affaiblissent' (They are getting weaker).

Le courant s'affaiblit à mesure que la batterie se vide.

Compound Tenses
In the passé composé, all reflexive verbs use 'être' as the auxiliary. Crucially, the past participle 'affaibli' must agree in gender and number with the subject. 'Elle s'est affaiblie' (She got weaker), 'Ils se sont affaiblis' (They got weaker).

When using it with modal verbs like pouvoir, vouloir, or devoir, the reflexive pronoun stays with the infinitive and must still change to match the subject. For example, 'Tu ne dois pas te laisser s'affaiblir' is incorrect; it should be 'Tu ne dois pas te laisser t'affaiblir' (though 'te laisser affaiblir' without the second reflexive is more common in that specific construction). A better example: 'Je sens que je vais m'affaiblir'.

L'économie risque de s'affaiblir si les taux d'intérêt augmentent encore.

Negative Constructions
The 'ne... pas' wraps around the pronoun and the conjugated verb. 'Il ne s'affaiblit pas' (He is not getting weaker).

You will often find s'affaiblir used in the gerund form (en s'affaiblissant) to describe how something happened. 'En s'affaiblissant, le vent a permis aux bateaux de rentrer au port.' (By weakening, the wind allowed the boats to return to port). This shows the cause-and-effect relationship between the weakening and another action. It is also common in the future tense to make predictions: 'Votre résistance s'affaiblira si vous ne dormez pas assez.' (Your resistance will weaken if you don't sleep enough).

La lumière s'affaiblissait à mesure que la tempête approchait.

Nous craignons que nos liens ne s'affaiblissent avec la distance.

The word s'affaiblir is omnipresent in French media, though its frequency varies by domain. If you tune into a French news channel like BFMTV or France 24, you are most likely to hear it during the economy segment. Analysts discuss the Euro s'affaiblissant against the Dollar or the purchasing power of citizens s'affaiblissant due to inflation. It sounds professional, objective, and precise.

Financial News
'Le cours de l'action s'affaiblit après l'annonce des résultats.' (The stock price is weakening after the results announcement.)

La croissance de la zone euro semble s'affaiblir ce trimestre.

In a medical or health context, a doctor might use it to describe a patient's condition. It’s a softer way of saying someone is getting worse without necessarily using the word mourir (to die) or empirer (to worsen). It focuses on the loss of strength. You might hear: 'Il s'affaiblit de jour en jour' (He is getting weaker day by day). This is common in family discussions about elderly relatives or during flu seasons.

Weather Reports
Meteorologists use it to describe hurricanes, storms, or heatwaves losing their intensity. 'L'ouragan s'affaiblit en touchant terre.'

Literary and cinematic contexts also favor s'affaiblir for dramatic effect. A character's will might s'affaiblir in the face of temptation. In historical documentaries, it is the go-to verb to describe the decline of empires, dynasties, or ideologies. It provides a sense of gradual, inevitable change. In everyday conversation, it's slightly more formal than saying 'je suis fatigué' (I'm tired), as it implies a loss of capacity rather than just a need for sleep.

L'odeur du parfum s'affaiblit après quelques heures.

Technology
Radio signals, battery life, or processing power in technical manuals often 's'affaiblissent'.

In summary, you'll hear it in the news, at the doctor's office, in weather forecasts, and in serious literature. It is a word of transition, marking the movement from strength to weakness across almost every aspect of human experience and natural law.

Sans entretien, la structure du pont va finir par s'affaiblir.

One of the most frequent errors English speakers make with s'affaiblir is forgetting the reflexive pronoun se. In English, the verb "to weaken" can be both transitive ("The virus weakens the body") and intransitive ("The body weakens"). In French, these are two different verbs: affaiblir (transitive) and s'affaiblir (intransitive/reflexive). If you say "Mon corps affaiblit," a French speaker will be waiting for you to say *what* your body is weakening.

The Reflexive Trap
Mistake: 'La tempête affaiblit.' Correct: 'La tempête s'affaiblit.' (The storm is weakening itself/is growing weaker).

Il ne faut pas dire 'Je vais affaiblir', mais 'Je vais m'affaiblir'.

Another common issue is the confusion between s'affaiblir and faiblir. While they are very close, faiblir often implies a momentary lapse or a failure to maintain a standard (like a runner slowing down in a race), whereas s'affaiblir usually describes a more general or structural loss of strength. For example, 'ne pas faiblir' is a common encouragement meaning 'don't give up,' while 'ne pas s'affaiblir' sounds like medical advice about maintaining muscle mass.

Spelling Errors
Learners often forget the double 'f' (writing 'afaiblir') or misspell the plural forms. Remember: 'nous nous affaiblissons' (double 's' for the -ir verb plural stem).

Agreement of the past participle is also a stumbling block. Because it's a reflexive verb using être, the past participle affaibli must agree with the subject if the reflexive pronoun is the direct object (which it usually is here). 'Elles se sont affaiblies' (feminine plural). If you forget the 'es', it's a grammatical error. Also, be careful not to confuse it with s'affadir (to become tasteless/bland), which sounds similar but relates to flavor or personality.

Attention : 'Elle s'est affaiblie' nécessite un 'e' à la fin.

Pronunciation Mistake
The 'ai' in 'affaiblir' is pronounced like the 'e' in 'get'. Some learners try to pronounce it like 'ay' in 'say', which is incorrect.

Finally, watch out for the 'nous nous' and 'vous vous' forms. It feels repetitive to English ears, but it is grammatically required. 'Nous nous affaiblissons' is the only way to say 'we are weakening'. Skipping one 'nous' changes the meaning or makes the sentence ungrammatical.

La position du gouvernement s'affaiblit (ne pas oublier le 's' apostrophe).

French offers a variety of verbs to express the idea of weakening, each with its own specific nuance. Choosing the right one can make your French sound much more natural and precise. While s'affaiblir is the most versatile and common, alternatives like décliner, diminuer, or s'étioler are frequently used in specific contexts.

S'affaiblir vs. Faiblir
'S'affaiblir' is structural and gradual (health, economy). 'Faiblir' is often about performance or willpower (a runner slowing down, a person giving in to an argument).

Sa santé s'affaiblit (structural), mais sa volonté ne faiblit pas (willpower).

S'étioler
This is a more poetic and literary verb. Originally used for plants that don't get enough light, it's used metaphorically for a person or a feeling that is slowly wasting away or losing its luster.

In economic contexts, se dégrader is often used as a synonym, though it implies a worsening of quality rather than just a loss of strength. Diminuer is used when referring to measurable quantities, like intensity or volume. For instance, 'Le bruit diminue' is more common than 'Le bruit s'affaiblit', although both are correct. Décliner is best for the end of an era or the later stages of life ('Le jour décline', 'Sa santé décline').

Les exportations ont tendance à s'amoindrir (to grow smaller/lessen).

S'amenuiser
Used for things that are getting thinner or smaller in quantity, like hopes or resources. 'Nos chances s'amenuisent.'

Finally, in informal French, people might use lâcher (to let go/give out) or mousser (less common for weakening). If a machine is getting weak, you might say 'Elle fatigue' or 'Elle est en train de lâcher'. Understanding these synonyms allows you to tailor your vocabulary to the level of formality and the specific nature of the 'weakening' you are describing.

L'enthousiasme commence à s'estomper (to fade/blur).

Les forces du patient périclitent (to decline/be in danger - very formal).

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Examples by Level

1

Le vent s'affaiblit ce soir.

The wind is weakening this evening.

Present tense, 3rd person singular.

2

Je me sens m'affaiblir un peu.

I feel myself getting a bit weak.

Reflexive pronoun 'me' matches 'Je'.

3

La lumière s'affaiblit dans la chambre.

The light is getting dim in the room.

Used for physical intensity.

4

Il s'est affaibli après la course.

He got weak after the race.

Passé composé with 'être'.

5

Ma batterie s'affaiblit vite.

My battery is weakening fast.

Common everyday usage.

6

Le bruit s'affaiblit au loin.

The noise is fading in the distance.

Describes sound diminishing.

7

Elle ne veut pas s'affaiblir.

She does not want to get weak.

Infinitive after 'vouloir'.

8

Nous nous affaiblissons sans manger.

We are getting weak without eating.

Plural form with '-iss-' infix.

1

Le malade s'affaiblit de jour en jour.

The patient is getting weaker day by day.

Expresses a gradual process.

2

La tempête s'est enfin affaiblie.

The storm has finally weakened.

Agreement: 'affaiblie' (feminine subject 'tempête').

3

Ton signal Wi-Fi s'affaiblit ici.

Your Wi-Fi signal is getting weak here.

Modern technical context.

4

Mes jambes s'affaiblissent après le sport.

My legs are getting weak after sports.

Plural agreement of the verb.

5

Le soleil s'affaiblit en fin de journée.

The sun weakens at the end of the day.

Natural phenomenon.

6

Est-ce que tu t'affaiblis quand tu as faim ?

Do you get weak when you are hungry?

Interrogative reflexive form.

7

La voix du chanteur s'affaiblit.

The singer's voice is growing faint.

Subject is 'la voix'.

8

Ils se sont affaiblis à cause du froid.

They got weak because of the cold.

Passé composé plural agreement.

1

L'euro s'affaiblit face au dollar cette semaine.

The euro is weakening against the dollar this week.

Economic register.

2

Leur influence commence à s'affaiblir dans la région.

Their influence is starting to weaken in the region.

Abstract concept: influence.

3

Si on ne l'arrose pas, la plante va s'affaiblir.

If we don't water it, the plant will get weak.

Future near with 'aller'.

4

La résistance du groupe s'affaiblissait lentement.

The group's resistance was slowly weakening.

Imparfait for description.

5

Il ne faut pas laisser les liens familiaux s'affaiblir.

One must not let family ties weaken.

Infinitive usage.

6

Ma vue s'est affaiblie avec les années.

My eyesight has weakened over the years.

Feminine agreement: 'affaiblie'.

7

Le mouvement de protestation s'affaiblit.

The protest movement is losing steam.

Sociological context.

8

Le parfum s'affaiblit après quelques heures.

The perfume fades after a few hours.

Sensory description.

1

La position du Premier ministre s'est affaiblie après le scandale.

The Prime Minister's position weakened after the scandal.

Political register.

2

Les traditions s'affaiblissent dans les grandes villes.

Traditions are weakening in big cities.

Cultural observation.

3

L'argument de l'accusation s'affaiblit faute de preuves.

The prosecution's argument is weakening due to lack of evidence.

Legal/Formal context.

4

En s'affaiblissant, le courant a déposé du sable sur la plage.

By weakening, the current deposited sand on the beach.

Gerund 'En s'affaiblissant'.

5

Il craignait que sa mémoire ne s'affaiblisse.

He feared that his memory might weaken.

Subjunctive mood after 'craindre'.

6

La demande pour ce produit s'affaiblit sur le marché.

The demand for this product is weakening on the market.

Business context.

7

Le métal s'affaiblit à cause de la corrosion.

The metal is weakening because of corrosion.

Technical/Scientific context.

8

Le moral des troupes s'est affaibli pendant l'hiver.

The troops' morale weakened during the winter.

Psychological state.

1

Le cadre institutionnel s'affaiblit face aux pressions populistes.

The institutional framework is weakening in the face of populist pressures.

Academic political analysis.

2

L'autorité du père s'affaiblit tout au long du récit.

The father's authority weakens throughout the narrative.

Literary analysis.

3

La portée de son message s'affaiblit par manque de clarté.

The impact of his message is weakened by a lack of clarity.

Abstract impact.

4

Il est impératif que les contrôles ne s'affaiblissent pas.

It is imperative that controls do not weaken.

Subjunctive in a formal requirement.

5

La monnaie s'était affaiblie bien avant la crise officielle.

The currency had weakened long before the official crisis.

Plus-que-parfait tense.

6

Les liens sociaux s'affaiblissent au profit de l'individualisme.

Social bonds are weakening in favor of individualism.

Sociological discourse.

7

Sa détermination ne s'est jamais affaiblie, malgré les épreuves.

Her determination never weakened, despite the trials.

Negation with 'ne... jamais'.

8

Le signal radio s'affaiblit à cause des interférences magnétiques.

The radio signal is weakening due to magnetic interference.

Technical precision.

1

L'hégémonie de cette pensée unique commence enfin à s'affaiblir.

The hegemony of this single way of thinking is finally starting to weaken.

High-level philosophical register.

2

Les facultés cognitives s'affaiblissent inéluctablement avec la sénescence.

Cognitive faculties inevitably weaken with senescence.

Scientific/Formal medical terminology.

3

Le lien de causalité s'affaiblit à mesure que les variables se multiplient.

The causal link weakens as the variables multiply.

Statistical/Logical analysis.

4

La ferveur révolutionnaire s'affaiblit dès que le confort matériel augmente.

Revolutionary fervor weakens as soon as material comfort increases.

Political philosophy.

5

Que sa résolution s'affaiblisse, et tout l'édifice s'écroulera.

Should his resolution weaken, the entire edifice will collapse.

Inverted subjunctive for hypothetical condition.

6

L'éclat de son génie s'affaiblit dans ses dernières œuvres.

The brilliance of his genius weakened in his final works.

Artistic criticism.

7

La souveraineté nationale s'affaiblit au sein des instances supranationales.

National sovereignty weakens within supranational bodies.

Geopolitical discourse.

8

Il ne faudrait pas que notre vigilance s'affaiblisse un seul instant.

Our vigilance must not weaken for even a single moment.

Conditional mood with negative subjunctive.

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