It can be used in several ways, including:
* As a noun: Meaning "kind person" or "nice person".
* As an adjective: Meaning "kind", "nice", "gentle", or "polite".
For example:
* "Il est un gentil garçon." (He is a nice boy.)
* "Elle est une gentille femme." (She is a kind woman.)
* "C'est un geste gentil." (It's a kind gesture.)