Lesson 46: Nominalization and word formation

Vocabulary: Suffixes and prefixes as a productive system, abstract nouns

How to work with this lesson

  1. Read the suffix and prefix rules — these aren't lists to memorize, they're formulas
  2. Run familiar verbs through every suffix — you'll double your vocabulary in an hour
  3. Rewrite spoken sentences in nominal style and feel the register flip

Learning isolated words = arithmetic. Learning affixes = algebra. One suffix unlocks 200 words. One prefix — another 200. And for English speakers, almost all of them already live in your head from post-1066 Latin-French inheritance.


Part 1: Why this lesson is a gift to English speakers

When William the Conqueror invaded England in 1066, French became the language of the English court, law, and church for 300 years. Result: roughly 40% of English vocabulary is Norman-French Latinate. Most of the suffixes in this lesson exist in English with the same meaning and almost the same spelling.

FrenchEnglishSame suffix?
la nationthe nation-tion ↔ -tion
le développementthe development-ment ↔ -ment
la libertéliberty-té ↔ -ty
l'existenceexistence-ence ↔ -ence
le tourismetourism-isme ↔ -ism
possible / impossiblepossible / impossibleim- ↔ im-
refaire / redoredore- ↔ re-

You don't need to learn the suffixes. You need to learn the gender pattern that comes with each one — that's the part English doesn't give you.


Part 2: What nominalization is and why C1 needs it

Nominalization = turning a verb or adjective into a noun.

  • développer (verb) → le développement (noun)
  • libre (adjective) → la liberté (noun)

Why this matters at C1:

  1. Vocabulary doubles. Know the verb — you basically know the noun, and vice versa.
  2. Formal register. Nominal style is the language of articles, laws, academic writing, and journalism.
  3. Compression. "Prices went up, and so…" → "Due to the rise in prices…"
Spoken (verbal style)Formal (nominal style)
Les prix ont augmenté.L'augmentation des prix.
Il a été nommé directeur.Sa nomination au poste de directeur.
Quand le mur est tombé…Lors de la chute du mur…
Parce que le projet s'est développé…En raison du développement du projet…

Register rule: in essays and reports — nominalize. In real conversation — don't overdo it, or you sound cold and bureaucratic. English has the same flip (compare "After the meeting ended…" with "After the conclusion of the meeting…").


Part 3: The big noun suffixes — and their forced gender

This is the single most important table in the lesson. Memorize the gender attached to each suffix. This alone solves about 30% of "what gender is this unknown noun?" guesses.

SuffixGenderBuilt fromMeaningExampleEnglish cognate
-tionlaverbaction, processcréer → la création-tion (creation)
-sionlaverbaction, resultdécider → la décision-sion (decision)
-mentleverbaction, resultchanger → le changement-ment (movement)
-ageleverbthe act of, processpasser → le passage-age (passage)
-té / -itélaadjectivequalitylibre → la liberté-ty / -ity (liberty)
-ance / -encelaverb / adjstateexister → l'existence-ance / -ence (existence)
-eur (quality)laadjectiveabstract measurelong → la longueur
-eur / -euse (agent)le / laverbthe one who doeschercher → le chercheur-er (researcher)
-esselaadjectivequalityriche → la richesse-ness (richness)
-ismelenoun / adjdoctrine, -ismréel → le réalisme-ism (realism)
-istele / lanounadherent, specialistjournal → le/la journaliste-ist (journalist)

THE GOLDEN GENDER RULE: Every word ending in -tion, -sion, -té, -ité, -ance, -ence, -essefeminine. La — never le. Every word ending in -ment, -age, -ismemasculine. Le — never la. 95% accuracy. Learn nouns with the article — the suffix already tells you which one.

The -age trap: usually masculine (le voyage, le passage, le lavage) — but a handful of common words that are not built from a verb are feminine: la page, la plage, la cage, l'image (f.), la rage, la nage, la cage. These are nouns that happen to end in -age; they were never verbs.


Part 4: Verb → noun — which suffix do I pick?

There's no rigid formula, but there are strong tendencies:

Type of verbUsually givesExample
Abstract action, Latinate root-tioncréer → création, expliquer → explication, traduire → traduction
Concrete, everyday process-agelaver → lavage, passer → passage, démarrer → démarrage
Change of state, development-mentchanger → changement, développer → développement, mouvoir → mouvement
Verb of existence or relation-ance / -enceexister → existence, dépendre → dépendance, croître → croissance

Hack for English speakers: if the English noun ends in -tion, the French noun almost certainly does too, and it's feminine. Information → l'information (f.), creation → la création, attention → l'attention (f.). Trust the cognate, just flip the gender to la.

Hack for -er verbs: if a French verb on -er has a clear Latin root (créer, expliquer, organiser, manifester) — it almost always takes -tion. If it's short and everyday (laver, passer, démarrer) — it usually takes -age or -ment.


Part 5: Adjective → noun (a quality)

AdjectiveNounSuffix
librela liberté-té
beaula beauté-té
nécessairela nécessité-ité
responsablela responsabilité-ité
réella réalité-ité
possiblela possibilité-ité
longla longueur-eur
profondla profondeur-eur
chaudla chaleur-eur
richela richesse-esse
faiblela faiblesse-esse
gentilla gentillesse-esse
patientla patience-ence
francla franchise-ise

Choice hack: adjectives ending in -al, -el, -ble, -ique, -ant → almost always take -ité (responsable → responsabilité, réel → réalité, possible → possibilité). Short adjectives (riche, faible, gentil) → -esse. Adjectives of physical measure (long, profond, chaud) → -eur (and that one is feminine — la longueur, not le).


Part 6: Adjective-forming suffixes (bonus inventory)

You'll meet these everywhere; they're nominalization in reverse:

SuffixMeaningExampleEnglish cognate
-able / -ible"can be X-ed"mangeable, lisible, faisable-able / -ible (readable, edible)
-eux / -euse"full of X"heureux, dangereux, courageux-ous (courageous)
-if / -ive"tending to X"actif/active, créatif/créative-ive (active)
-aire"related to X"bancaire, scolaire, populaire-ary (bancary, popular)
-eur / -euse (adj)agent / "X-er"travailleur, menteur-er (worker, liar)

All of these inherit the English meaning — you already know what imaginable, défensive, vulnérable, anxieux, parlementaire mean. You only need to learn which suffix French chose.


Part 7: Productive prefixes

PrefixMeaningExampleEnglish cognate
re- / ré-repetition, returnfaire → refaire (to redo), voir → revoir (to see again)re- (redo, review)
dé- / dés-undoing, removalfaire → défaire (to undo), coller → décoller (to unstick; to take off)de- / dis- (defrost, disconnect)
in- / im- / il- / ir-negation (on adjectives)utile → inutile, possible → impossible, légal → illégal, réel → irréelin- / im- / il- / ir- (impossible, illegal)
mé- / més-badly, wronglycontent → mécontent, fier → méfiantmis- (misjudge)
sur-over, above, excesscharger → surcharger, estimer → surestimer, vivre → survivreover- / super- (overload)
sous-under, below, insufficiencyestimer → sous-estimer, titre → le sous-titresub- / under- (subtitle, underestimate)
pré-beforehandvoir → prévoir, avis → le préavispre- (preview, predict)
anti-againstchoc → antichoc, virus → l'antivirusanti- (antivirus)
co- / con-togetherexister → coexister, auteur → le coauteurco- / con- (coexist)

The in- family — choosing the right variant:

  • im- before p, b, m: impossible, imbattable, immobile
  • il- before l: illégal, illisible, illimité
  • ir- before r: irréel, irresponsable, irrégulier
  • in- everywhere else: inutile, incapable, inconnu, indispensable

Logic: the consonant assimilates so the mouth doesn't have to switch positions. English does the exact same trick (impossible, illegal, irregular, inconvenient) — same rule, same logic.


Part 8: Compound nouns with a hyphen

Usually formed as verb + noun or preposition + noun. The verb half doesn't conjugate — it's frozen in third-person singular form.

WordLiterallyMeaning
un porte-monnaie"carries-coin"wallet, coin purse
un ouvre-boîte"opens-can"can opener
un tire-bouchon"pulls-cork"corkscrew
un essuie-glace"wipes-window"windshield wiper
un sans-abri"without-shelter"homeless person
un sous-titre"under-title"subtitle
un porte-parole"carries-word"spokesperson

Plural rule: the verb part stays frozen; only the noun part takes -s where logical. Des ouvre-boîtes (multiple can-openers), des porte-monnaie (still singular monnaie — there's only one money). Modern reform: when in doubt, put -s on the second element.


Part 9: Traps

  1. -eur agent vs -eur quality — different genders!

    • le chercheur (researcher), le traducteur (translator) — masculine (with feminine forms la chercheuse, la traductrice)
    • la chaleur (heat), la longueur (length), la profondeur (depth) — feminine, and there is no masculine version.
    • Test: if the noun has an -euse or -trice feminine — it's an agent (masculine for the male, feminine for the female). If it doesn't — it's an abstract quality and feminine by default.
  2. dé- doesn't always mean "undo": décoller means both "to unstick" and "to take off" (of an airplane). Découvrir means "to discover" (Latin discoperire), not "to uncover" in the modern sense. Context decides.

  3. Not every -tion noun comes from a verb you know: la nation, la position, la condition — Latin roots without an obvious modern French verb. Treat them as standalone vocabulary, but the gender rule still applies (always la).

  4. One verb can give two nouns with different shades:

    • passerle passage (a passing, a passage in a text) and historically gave the unrelated la passion (from Latin passio — different root family).
    • changerle changement (a change) and l'échange (m., an exchange — different prefix, different meaning).
  5. The English speaker's biggest mistake: assuming gender from meaning ("a movement is a thing, it should be neuter — let me guess la"). Don't guess from meaning — read the suffix. -ment → le mouvement. Always.


Next up: Lesson 47 — Aspect, mise en relief, and emphatic structures (c'est … qui/que, moi je …, ce que j'aime, c'est…). You'll learn how French puts a spotlight on the exact word you want to emphasize — without raising your voice the way English does.

Lesson 46: Nominalization and word formation · Français · Glottos Matrix