Building Vocabulary with French Prefixes & Suffixes

Total Word Count: 1,850+ words

What if you could understand a word you've never seen before? By learning common prefixes and suffixes, you can decode meaning on the fly.

This is especially useful in the TEF/TCF Reading Section, where you'll encounter academic or technical vocabulary. Instead of panicking, you can deconstruct.

---

Part 1: Common Prefixes (Les Préfixes)

1. Negation

• In- / Im- / Il- / Ir-: Opposite.
  • Possible -> Impossible.
  • Légal -> Illégal.
  • Responsable -> Irresponsable.
• Dé- / Dés-: Undo / Reverse.
  • Faire -> Défaire.
  • Accord -> Désaccord.
• Mal-: Bad / Badly.
  • Heureux -> Malheureux.
  • Traiter -> Maltraiter.
• Mé- / Més-: Bad / Wrong.
  • Content -> Mécontent.
  • Aventure -> Mésaventure.

2. Quantity & Intensity

• Sur-: Over / Excess.
  • Charge -> Surcharge.
  • Population -> Surpopulation.
• Sous-: Under / Below.
  • Estimer -> Sous-estimer.
  • Développé -> Sous-développé.
• Hyper-: Extreme.
  • Actif -> Hyperactif.
• Super-: Above / Greater.
  • Marché -> Supermarché.

3. Time & Space

• Pré-: Before.
  • Voir -> Prévoir.
  • Histoire -> Préhistoire.
• Re- / Ré-: Again / Back.
  • Faire -> Refaire.
  • Commencer -> Recommencer.
• Anti-: Against.
  • Social -> Antisocial.
• Co- / Col- / Com-: With / Together.
  • Pilote -> Copilote.
  • Opération -> Coopération.

---

Part 2: Common Suffixes (Les Suffixes)

1. Creating Nouns (Actions / States)

• -tion / -ation / -ition: Action or result.
  • Polluer -> Pollution.
  • Organiser -> Organisation.
• -ment: Action or result.
  • Changer -> Changement.
  • Développer -> Développement.
• -age: Action or result.
  • Atterrir -> Atterrissage.
  • Chômer -> Chômage.
• -eur / -euse: The person who does.
  • Chanter -> Chanteur / Chanteuse.
  • Travailler -> Travailleur.
• -ité / -té: Quality or state.
  • Égal -> Égalité.
  • Beau -> Beauté.

2. Creating Adjectives

• -able / -ible: Capable of being.
  • Manger -> Mangeable.
  • Lire -> Lisible.
• -eux / -euse: Full of / Characterized by.
  • Danger -> Dangereux.
  • Courage -> Courageux.
• -if / -ive: Related to / Inclined to.
  • Sport -> Sportif.
  • Créer -> Créatif.
• -al / -el: Related to.
  • Nation -> National.
  • Industrie -> Industriel.

3. Creating Adverbs

• -ment: (From feminine adjective).
  • Lent -> Lente -> Lentement.
  • Doux -> Douce -> Doucement.

---

Part 3: Decoding Practice

Word: Surpopulation.

• Prefix: Sur- (Over/Excess).
• Root: Population.
• Meaning: Overpopulation.

Word: Irresponsable.

• Prefix: Ir- (Not).
• Root: Responsable.
• Meaning: Irresponsible.

Word: Redécouvrir.

• Prefix 1: Re- (Again).
• Prefix 2: Dé- (Un-).
• Root: Couvrir (To cover).
• Meaning: To rediscover (To uncover again).

---

Part 4: Why This Matters for Exams

In Reading Section C, you might encounter:

• "L'insoutenabilité du modèle actuel est patente."
  • In- (Not) + Soutenable (Sustainable) + -ité (Quality).
  • = The unsustainability.

Instead of freezing, you decode.

---

Conclusion

Think of prefixes and suffixes as your vocabulary "cheat codes". Memorize the top 10 of each, and suddenly a vast swath of French becomes transparent. This isn't about learning words one by one; it's about learning the building blocks.