The suffix -eur, with its feminine partner -euse (and the learned variant -teur / -trice), is one of the busiest pieces of French morphology. It does two distinct jobs that learners often conflate, then has to keep straight to use the language well.
The first job is forming agent nouns — words for a person (or sometimes a machine) that performs the action of a verb. Travailler → travailleur / travailleuse (a worker). Vendre → vendeur / vendeuse (a salesperson). These nouns are gendered, and modern French insists on inflecting them for the sex of the referent more strictly than it once did.
The second job is forming abstract nouns of quality from adjectives. Haut → la hauteur (height). Large → la largeur (width). Profond → la profondeur (depth). These nouns are always feminine and refer to the property itself, not a person.
The two functions look identical on the surface but behave very differently grammatically. This page treats each in turn and then shows how to keep them separate.
Agent nouns: -eur (masculine) / -euse (feminine)
An agent noun in -eur names a person who performs the verb. The masculine ends in -eur; the feminine, formed from the same stem, ends in -euse. The stem is the present-tense plural stem of the verb (the nous-form minus -ons), then -eur or -euse is added.
| Verb | Masculine | Feminine | Meaning |
|---|---|---|---|
| vendre (sell) | vendeur | vendeuse | salesperson |
| travailler (work) | travailleur | travailleuse | worker |
| chanter (sing) | chanteur | chanteuse | singer |
| danser (dance) | danseur | danseuse | dancer |
| nager (swim) | nageur | nageuse | swimmer |
| coiffer (do hair) | coiffeur | coiffeuse | hairdresser |
| voler (steal) | voleur | voleuse | thief |
| mentir (lie) | menteur | menteuse | liar |
| flatter (flatter) | flatteur | flatteuse | flatterer |
| tricher (cheat) | tricheur | tricheuse | cheater |
| baigner (bathe) | baigneur | baigneuse | bather, swimmer |
| chercher (look for) | chercheur | chercheuse | researcher |
| skier (ski) | skieur | skieuse | skier |
| boxer (box) | boxeur | boxeuse | boxer |
Ma sœur est vendeuse dans une boutique de vêtements.
My sister works as a salesperson in a clothing shop.
C'est un travailleur acharné, il ne prend jamais de pause.
He's a relentless worker — he never takes a break.
La chanteuse a annoncé sa retraite hier soir.
The singer announced her retirement yesterday evening.
Méfie-toi de lui, c'est un menteur invétéré.
Watch out for him — he's a habitual liar.
Agent nouns of machines
When -eur names a device rather than a person, the form stays masculine — French does not feminize machine-names by sex.
| Verb | Device | Meaning |
|---|---|---|
| ordonner (order, arrange) | un ordinateur | computer |
| aspirer (suck up) | un aspirateur | vacuum cleaner |
| réfrigérer (refrigerate) | un réfrigérateur | refrigerator |
| ventiler (ventilate) | un ventilateur | fan |
| amplifier (amplify) | un amplificateur | amplifier |
| chauffer (heat) | un chauffeur | driver (originally a stoker) |
| mélanger (mix) | un mélangeur | mixer, blender |
| congeler (freeze) | un congélateur | freezer |
| traduire (translate) | un traducteur (en ligne) | translator (software) |
Productivity and modern formations
-eur / -euse remains productive for new verbs, especially in informal speech and journalism. Bloguer (to blog) gives un blogueur / une blogueuse. Skater gives un skateur / une skateuse. Rapper gives un rappeur / une rappeuse. Tweeter gives un tweeteur / une tweeteuse, though the English un tweetos circulates informally. Modern professions and hobbies often allow learners to form the -eur / -euse themselves and be understood.
C'est une blogueuse très suivie sur Instagram.
She's a blogger with a big Instagram following.
Les skieurs ont profité de la neige fraîche tout le weekend.
The skiers made the most of the fresh snow all weekend.
The learned variant: -teur / -trice
A subset of agent nouns inherits the Latin -tor / -trix pair and surfaces in French as -teur / -trice rather than -eur / -euse. These are typically older words from learned (Latin-derived) vocabulary, often professions of high social standing or scientific roles.
| Verb | Masculine | Feminine | Meaning |
|---|---|---|---|
| agir / jouer un rôle (act) | acteur | actrice | actor / actress |
| réaliser (direct a film) | réalisateur | réalisatrice | director |
| diriger (direct, manage) | directeur | directrice | director, manager |
| regarder (watch — Latin spectare) | spectateur | spectatrice | spectator, viewer |
| traduire (translate) | traducteur | traductrice | translator |
| animer (host, animate) | animateur | animatrice | presenter, host |
| éduquer (educate) | éducateur | éducatrice | educator |
| conduire (drive) | conducteur | conductrice | driver |
| présenter (present) | présentateur | présentatrice | presenter, news anchor |
| inspecter (inspect) | inspecteur | inspectrice | inspector |
La réalisatrice a remporté le prix du meilleur film au festival.
The director won the best film prize at the festival.
C'est une traductrice littéraire, elle traduit de l'italien vers le français.
She's a literary translator — she translates from Italian into French.
La directrice de l'école nous a reçus tout de suite.
The school principal received us right away.
-eur/-euse vs -teur/-trice: how to predict
In broad strokes:
- Verbs from Old French / popular vocabulary take -eur / -euse: vendeur, chanteur, coiffeur, travailleur.
- Verbs from learned Latin borrowings take -teur / -trice: acteur, directeur, éducateur, spectateur.
- A handful of high-frequency irregulars: docteur has the feminine docteure (Canada) or docteur (used as is in France for now, though docteure and doctoresse are gaining ground). Professeur gives professeure (modern, official since 2019 in France) or remains professeur in conservative usage; professoresse is rare and archaic.
There is no fully reliable rule. The pattern broadly tracks etymology, but learners should treat the masculine-feminine pair as a unit and memorize whether the feminine is -euse or -trice for each profession.
Abstract nouns of quality: -eur from adjectives
Now the second job. Attached to an adjective stem, -eur forms an abstract noun naming the quality. These nouns are always feminine, regardless of any agent-noun pattern. The semantic core is "the property of being X."
| Adjective | Noun | Meaning |
|---|---|---|
| haut (high) | la hauteur | height |
| large (wide) | la largeur | width |
| long (long) | la longueur | length |
| profond (deep) | la profondeur | depth |
| épais (thick) | l'épaisseur | thickness |
| grand (big, great) | la grandeur | greatness, size |
| gros (big, fat) | la grosseur | size, lump |
| doux (sweet, soft) | la douceur | sweetness, softness |
| chaud (hot) | la chaleur | heat |
| froid (cold) | la froideur | coldness (often emotional) |
| pâle (pale) | la pâleur | paleness |
| blanc (white) | la blancheur | whiteness |
| splendide (splendid) | la splendeur | splendor |
| lent (slow) | la lenteur | slowness |
| raide (stiff) | la raideur | stiffness |
| laid (ugly) | la laideur | ugliness |
| maigre (thin) | la maigreur | thinness |
La largeur du salon est juste de deux mètres soixante.
The width of the living room is exactly two metres sixty.
Sa douceur cache une volonté de fer.
His gentleness hides an iron will.
La chaleur était insupportable en juillet, on n'a presque pas dormi.
The heat was unbearable in July — we barely slept.
J'admire la grandeur de son projet, même si je doute qu'il le réalise.
I admire the ambition of his project, even if I doubt he'll pull it off.
A handful of irregulars: masculine abstract -eur nouns
A small set of abstract -eur nouns are masculine, not feminine. They are inherited from masculine Latin nouns and have to be memorized.
| Noun | Meaning |
|---|---|
| le bonheur | happiness |
| le malheur | unhappiness, misfortune |
| l'honneur (m.) | honour |
| le labeur | labour, toil (literary) |
| le déshonneur | dishonour |
Le bonheur, ce n'est pas toujours là où on l'attend.
Happiness isn't always where you expect it.
C'est un grand honneur de recevoir ce prix.
It's a great honour to receive this award.
Telling the two systems apart
The single most useful diagnostic: what is the base?
- If the base is a verb, the noun in -eur is an agent noun and has a -euse (or -trice) feminine. Gender depends on the referent's sex.
- If the base is an adjective, the noun in -eur is an abstract quality noun and is feminine (with the closed exception list). No -euse / -trice feminine exists, because the noun is not gendered by sex.
Compare:
- chanteur (from chanter, a verb) — agent noun, masculine when the singer is male; the feminine is chanteuse. Gender follows the person.
- chaleur (from chaud, an adjective) — abstract noun, always feminine, no chaleur / chaleuse contrast. La chaleur refers to the property of heat.
The orthographic identity of the suffix masks this two-system distinction. Once you anchor it to the part of speech of the base, everything sorts out.
Source-language note: English -er and -ness
English splits the work of French -eur between two distinct suffixes. English -er (or -or) makes agent nouns: worker, singer, dancer, driver, actor. English -ness (or -th in old formations) makes abstract quality nouns: happiness, softness, darkness; length, breadth, depth. French uses -eur for both.
Two practical consequences:
- English speakers tend to underuse the abstract-quality -eur and reach for periphrasis (l'état d'être chaud instead of la chaleur). Don't. Use the noun.
- English speakers tend to mix up agent and quality forms. La chaleur is the property of being hot. The agent — what heats — is le chauffage (the heating system) or un radiateur (a radiator); le chauffeur once meant a stoker but in modern French means a driver. Same root, different specializations.
Feminization of agent nouns: the modern wave
French has been steadily feminizing professions over the last forty years. Forms once considered ungrammatical or merely "Canadian" are now official in France. Une auteure (or une autrice), une professeure, une écrivaine, une chercheuse — all are now expected in administrative and journalistic writing. The Académie française resisted until 2019, then accepted the practice.
C'est une autrice de polars très connue dans le milieu.
She's a thriller writer very well known in the field.
La professeure de maths a expliqué l'exercice trois fois.
The maths teacher explained the exercise three times.
See nouns/feminization-of-professions for the full system, including the contested cases (une auteur vs une auteure vs une autrice).
Common Mistakes
Mistake 1: Using -eur for a female agent.
❌ Ma sœur est un vendeur dans une parfumerie.
The masculine form is for male agents. For a female salesperson, use vendeuse.
✅ Ma sœur est vendeuse dans une parfumerie.
My sister is a salesperson in a perfume shop.
Mistake 2: Using -euse where -trice is required.
❌ Elle est acteuse depuis dix ans.
The verb 'jouer' inherits from a Latin learned formation, so the feminine is actrice, not 'acteuse'.
✅ Elle est actrice depuis dix ans.
She's been an actress for ten years.
Mistake 3: Treating bonheur / honneur as feminine.
❌ Quelle bonheur de te revoir !
Bonheur is a masculine -eur noun, even though most abstract -eur nouns are feminine.
✅ Quel bonheur de te revoir !
What a joy to see you again!
Mistake 4: Treating an adjective-based -eur noun as having a feminine -euse form.
❌ La chaleuse de l'été a été insupportable.
*Chaleuse does not exist. The abstract noun from 'chaud' is la chaleur, feminine, with no -euse counterpart.
✅ La chaleur de l'été a été insupportable.
The summer heat was unbearable.
Mistake 5: Forgetting to make the adjective agree with a feminine agent noun.
❌ Elle est une chanteuse très connu.
The adjective must agree with the feminine noun: connue.
✅ Elle est une chanteuse très connue.
She's a very well-known singer.
Mistake 6: Using -eur for a machine when -ateur is the conventional form.
❌ J'ai acheté un nouveau aspireur.
*Aspireur does not exist. The vacuum cleaner is aspirateur, with the -ateur suffix derived from a different stem.
✅ J'ai acheté un nouvel aspirateur.
I bought a new vacuum cleaner.
Key takeaways
- -eur / -euse forms agent nouns from verbs: vendeur / vendeuse, travailleur / travailleuse. Gender tracks the referent's sex.
- -teur / -trice is the Latin-learned variant for older or higher-register agent nouns: acteur / actrice, directeur / directrice. Learn each masculine-feminine pair together.
- Attached to an adjective, -eur forms an abstract quality noun, almost always feminine: la hauteur, la chaleur, la douceur.
- A small exception list of masculine abstract -eur nouns must be memorized: le bonheur, le malheur, l'honneur, le labeur.
- French is actively feminizing agent nouns. Use autrice, professeure, chercheuse, cheffe in modern writing.
- English splits this work into -er (agent) and -ness (quality); French uses -eur for both. Don't import English-style periphrasis — use the dedicated noun.
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