diff --git a/src/cn/index.ts b/src/cn/index.ts
index 6941441..1d7c9c9 100644
--- a/src/cn/index.ts
+++ b/src/cn/index.ts
@@ -2,6 +2,7 @@ interface Classname {
   [key: string]: boolean;
 }
 
+/** 여러 개의 className을 합치는 함수 */
 export function cn(classes: Classname) {
   return Object.entries(classes)
     .filter(([, value]) => value)