-eux → -euse
Feminine of Adjectives Ending in -eux
Masculine: -eux (silent 'x')
Feminine: -euse (pronounced 'z')
How It Works
This pattern is one of the most common ways to form feminine adjectives in French. It applies to many adjectives derived from nouns (like courage becoming courageux).
1. The Rule:
To change a masculine adjective ending in -eux to feminine:
- Remove the -x.
- Add -se.
- Example: heureux (m) → heureuse (f).
2. Pronunciation Shift:
This is not just a spelling change; it changes how the word sounds:
- Masculine (-eux): The 'x' is silent. The word ends in a rounded 'uh' sound (/ø/).
- Feminine (-euse): The 's' is pronounced like a 'z' sound (/øz/) because it is between two vowels.
3. Plural Forms:
- The masculine plural remains -eux (no change).
- The feminine plural adds an 's' to become -euses.
4. Core Exceptions:
Some very common adjectives ending in -x do not follow the -se rule:
- doux (sweet/soft) → douce
- faux (false/wrong) → fausse
- roux (red-haired) → rousse
5. The Special Case of 'Vieux':
The adjective vieux (old) is highly irregular:
- Feminine: vieille (e.g., une vieille dame).
- Special Masculine: Use vieil before a masculine noun starting with a vowel or silent 'h' (e.g., un vieil homme).
Examples (4)
- Il est heureux, et elle est heureuse.
He is happy, and she is happy.
Word by Word: He is happy, and she is happy.
Notice how 'heureux' changes to 'heureuse' to match the feminine subject 'elle'.
- C'est un garçon courageux et une fille courageuse.
It is a brave boy and a brave girl.
Word by Word: It is a boy brave and a girl brave.
The adjective 'courageux' (brave) follows the noun it describes and changes its ending for the feminine 'fille'.
- Le film est ennuyeux, mais la pièce est ennuyeuse.
The movie is boring, but the play is boring.
Word by Word: The movie is boring, but the play is boring.
Since 'pièce' (play) is a feminine noun, 'ennuyeux' becomes 'ennuyeuse'.
- Ce chemin est dangereux ; cette route est dangereuse.
This path is dangerous; this road is dangerous.
Word by Word: This path is dangerous; this road is dangerous.
The masculine 'chemin' uses 'dangereux', while the feminine 'route' uses 'dangereuse'.
Common Mistakes
Adding an 'e' without removing the 'x'.
Elle est heureuxe.Elle est heureuse.You must replace the 'x' with 'se'. Writing 'xe' is a common spelling error for beginners.
Applying the -euse rule to 'doux', 'faux', or 'roux'.
Une musique douse.Une musique douce.While most -eux adjectives change to -euse, 'doux' (sweet/soft) becomes 'douce', 'faux' (false) becomes 'fausse', and 'roux' (red-haired) becomes 'rousse'.
Using 'vieux' before a masculine noun starting with a vowel.
Un vieux ami.Un vieil ami.For the adjective 'vieux', you must use the special form 'vieil' before masculine singular nouns that start with a vowel or a silent 'h' to make the pronunciation smoother.
How It Connects
Learn This First
To understand how adjectives ending in -eux change to -euse, you first need to understand the concept of grammatical gender in French and the general rule that adjectives must change their form to match the gender of the noun they describe.
Related Patterns
- Adjective agreement concept
This is the foundational concept that requires adjectives to change their form based on gender.
Level 1 - beau / nouveau / vieuxIrregular Feminine Forms
This covers 'vieux', the most important exception to the -eux rule.
Level 1 - -f → -veFeminine of Adjectives Ending in -f
Another common pattern where the final consonant of a masculine adjective changes in the feminine form.
Level 1
Words in This Pattern
Practice -eux → -euse in Bubblegum
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