Gender Agreement
Adjectives agree in gender with the noun they modify.
Most adjectives form the feminine from the masculine by adding -e, including adjectives ending with é:
| masculine | feminine | |
| petit | petite | (small) | 
| joli | jolie | (pretty) | 
| français | française | (French) | 
| noir | noire | (black) | 
| élégant | élégante | (elegant) | 
| âgé | âgée | (old) | 
Note: adjectives ending in -e have the same masculine and feminine forms:
| aimable | aimable | (amiable) | 
| difficile | difficile | (difficult) | 
Adjectives ending in -x form the feminine by changing -x to -se:
| curieux | curieuse | (curious) | 
| heureux | heureuse | (happy) | 
Adjectives ending in -f form the feminine by changing -f to -ve:
| actif | active | (lively/active) | 
| expressif | expressive | (expressive) | 
| fautif | fautive | (wrong/at fault) | 
Adjectives ending in -er form the feminine by changing -er to -ère.
| dernier | dernière | (last) | 
| étranger | étrangère | (foreign) | 
| léger | légère | (light) | 
Some adjectives form the feminine by doubling the final consonant before adding -e:
| pareil | pareille | (same, similar) | 
| ancien | ancienne | (old/ancient) | 
| bas | basse | (low) | 
| bon | bonne | (good/kind) | 
| cruel | cruelle | (cruel) | 
| gentil | gentille | (nice, kind) | 
| sot | sotte | (silly, foolish) | 
Most adjectives ending with -eur or -teur form their feminine in -euse or -teuse:
un
  avenir prometteur (a promising future)
  une aventure prometteuse (a promising adventure)
However, a few unusual adjectives change -teur into -trice:
un agent
  corrupteur (a corrupting agent)
  une influence corruptrice (a corrupting
  influence)
Some adjectives have irregular feminine forms:
| blanc | blanche | (white) | 
| complet | complète | (complete) | 
| doux | douce | (soft) | 
| faux | fausse | (false) | 
| favori | favorite | (favorite) | 
| frais | fraîche | (cool/fresh) | 
| franc | franche | (frank) | 
| inquiet | inquiète | (worried/uneasy) | 
| long | longue | (long) | 
| public | publique | (public) | 
| roux | rousse | (reddish) | 
| sec | sèche | (dry) | 
| secret | secrète | (secret) | 
| *beau (bel) | belle | (beautiful) | 
| *fou (fol) | folle | (mad, crazy) | 
| *mou (mol) | molle | (soft) | 
| *vieux (vieil) | vieille | (old) | 
| *nouveau (nouvel) | nouvelle | (new) | 
*These five masculine adjectives have an alternative form before a masculine noun beginning with a vowel or a "mute" h. Their feminine singular is formed by doubling the last consonant before adding the usual -e.
See Also: