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Illustrated garden with owls, pebbles, jewels and cabbages, signs showing French -oux plural forms
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Irregular Plurals in French

Seven French words ending in -ou take an x in the plural (bijou, caillou, chou, genou, hibou, joujou, pou), oeil becomes yeux, cheval turns into chevaux. Test the plurals that defy French rules.

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The 10 quiz questions

Question 1 : What is the correct plural of "hibou" (owl) in French?

Possible answers:

  • Hiboux
  • Hibou
  • Hiboues
  • Hibous

Explanation: "Hibou" is one of the 7 French words ending in -ou that take an X in the plural: bijou, caillou, chou, genou, hibou, joujou, pou.

Question 2 : What is the correct plural of "cheval" (horse) in French?

Possible answers:

  • Chevales
  • Chevaux
  • Chevauxs
  • Chevals

Explanation: "Cheval" becomes "chevaux" in the plural, like most words ending in -al (journal/journaux, animal/animaux). Exceptions: bal, carnaval, festival...

Question 3 : What is the plural of "œil" (eye) in French?

Possible answers:

  • Yeuxs
  • Œilles
  • Œils
  • Yeux

Explanation: Œil becomes yeux in the plural, a transformation inherited from Latin "oculus" (plural "oculi"). Exception: "des œils-de-bœuf" is used for round windows.

Question 4 : What is the correct plural of "travail" (work) in French?

Possible answers:

  • Travaux
  • Travails
  • Travailes
  • Travailles

Explanation: "Travail" becomes "travaux" in the plural. Note: "des travails" exists only to refer to the apparatus used by farriers.

Question 5 : Which French word ending in -ou takes an X in plural form?

Possible answers:

  • Verrou
  • Trou
  • Genou
  • Clou

Explanation: Only 7 French words ending in -ou take an X in the plural: bijou, caillou, chou, genou, hibou, joujou, pou. All others take an S (clous, trous...).

Question 6 : What is the correct plural of "festival" in French?

Possible answers:

  • Festivaux
  • Festivales
  • Festivalx
  • Festivals

Explanation: "Festival" becomes "festivals" in the plural, it is one of the exceptions to -al words that usually become -aux (bal, carnaval, chacal, festival, récital...).

Question 7 : What is the correct plural of "monsieur" in French?

Possible answers:

  • Messieur
  • Messieurs
  • Monsieurs
  • Monssieurs

Explanation: "Monsieur" becomes "messieurs" in the plural, because the word comes from "mon sieur" (my lord), and "sieur" became "sieurs" in the plural.

Question 8 : What is the correct plural of "vitrail" (stained-glass window) in French?

Possible answers:

  • Vitrailles
  • Vitrails
  • Vitraux
  • Vitrailes

Explanation: "Vitrail" becomes "vitraux" in the plural, like most words ending in -ail (travail/travaux, émail/émaux). Exceptions: détails, rails, portails...

Question 9 : What is the correct plural of "ciel" (sky) in French?

Possible answers:

  • Cielles
  • Cielx
  • Ciels
  • Cieux

Explanation: "Ciel" becomes "cieux" when referring to the celestial vault. "Ciels" exists for artistic representations (Turner's skies).

Question 10 : What is the correct plural of "aïeul" (ancestor) in French?

Possible answers:

  • Aïeulx
  • Aïeules
  • Aïeux
  • Aïeuls

Explanation: "Aïeul" becomes "aïeux" when talking about ancestors in general. "Aïeuls" specifically refers to grandparents (the four grandparents).

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