Is « appui » masculine or feminine?
« appui » is masculine. You say l'appui.
Article forms
| With the definite article | l'appui |
| With the indefinite article | un appui |
| With the partitive article | de l'appui |
Plural
The plural is appuis (les appuis). A noun keeps its gender in the plural; only the article stops showing it.
Common questions
Is « appui » masculine or feminine?
« appui » is masculine. You say l'appui.
« l'appui » hides the gender. Is « appui » masculine or feminine?
It is masculine. The article shortens to « l'appui » for both genders, but you say un appui, not une appui, and adjectives take the masculine form.
Check another word, or read the complete guide to French noun gender.