In French, adjectives ending in -eux have a specific feminine form.
Learn how to make the feminine form of adjectives ending in -eux in French
Look at these adjectives:
Il est heureux à Paris, et elle est heureuse à Londres.He's happy in Paris, and she's happy in London.
C'est un livre ennuyeux. -Oui, cette histoire est ennuyeuse.This is a boring book. -Yes, this story is boring.
Adjectives ending in -eux in the masculine form become -euse in the feminine form.
Note that many of the English equivalents end in "-ous"
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Examples and resources
C'est un livre ennuyeux. -Oui, cette histoire est ennuyeuse.This is a boring book. -Yes, this story is boring.
C'est un film merveilleux, avec une actrice merveilleuse.This is a marvelous film, with a marvelous (female) actor.
Il est heureux à Paris, et elle est heureuse à Londres.He's happy in Paris, and she's happy in London.
Il est furieux contre elle, et elle est furieuse contre lui.He's furious with her, and she's furious with him.
C'est un homme courageux. -Oui, et c'est une femme courageuse.He's a courageous man. -Yes, and she's a courageous woman.
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