diff --git a/docs/src/pages/docs/api/combine.en.mdx b/docs/src/pages/docs/api/combine.en.mdx
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+---
+title: combine
+---
+
+import { Sandpack } from '@/components/Sandpack';
+
+# combine 
+
+## combineCharacter
+
+Given inputs of an choseong, jungseong, and jongseong return a single Korean character
+
+```typescript
+function combineCharacter(choseong: string, jungseong: string, jongseong?: string): boolean;
+```
+
+### Examples
+
+```typescript
+combineCharacter('ㄱ', 'ㅏ', 'ㅂㅅ') // '값'
+combineCharacter('ㅌ', 'ㅗ') // '토'
+```
+
+### Demo
+
+<br />
+
+<Sandpack>
+
+```ts index.ts
+import { combineCharacter } from 'es-hangul';
+
+console.log(combineCharacter('ㄱ', 'ㅏ', 'ㅂㅅ')) 
+console.log(combineCharacter('ㅌ', 'ㅗ')) 
+
+```
+
+</Sandpack>
+
+
+## combineVowels
+
+Given two vowel inputs, combine them to create a diphthong. If the vowels cannot be combined according to the correct Korean rules, simply join them together
+
+```typescript
+function combineVowels(vowel1: string, vowel2: string): string 
+```
+
+### Examples
+
+```typescript
+combineVowels('ㅗ', 'ㅏ') // 'ㅘ'
+combineVowels('ㅗ', 'ㅐ') // 'ㅙ'
+combineVowels('ㅗ', 'ㅛ') // 'ㅗㅛ'
+```
+
+### Demo
+
+<br />
+
+<Sandpack>
+
+```ts index.ts
+import { combineVowels } from 'es-hangul';
+
+console.log(combineVowels('ㅗ', 'ㅏ'))
+console.log(combineVowels('ㅗ', 'ㅐ'))
+console.log(combineVowels('ㅗ', 'ㅛ'))
+
+```
+</Sandpack>
diff --git a/docs/src/pages/docs/api/combine.ko.mdx b/docs/src/pages/docs/api/combine.ko.mdx
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+++ b/docs/src/pages/docs/api/combine.ko.mdx
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+---
+title: combine
+---
+
+import { Sandpack } from '@/components/Sandpack';
+
+# combine 
+
+## combineCharacter
+
+인자로 초성, 중성, 종성을 받아 하나의 한글 문자를 반환합니다.
+
+```typescript
+function combineCharacter(choseong: string, jungseong: string, jongseong?: string): boolean;
+```
+
+### Examples
+
+```typescript
+combineCharacter('ㄱ', 'ㅏ', 'ㅂㅅ') // '값'
+combineCharacter('ㅌ', 'ㅗ') // '토'
+```
+
+### 사용해보기
+
+<br />
+
+<Sandpack>
+
+```ts index.ts
+import { combineCharacter } from 'es-hangul';
+
+console.log(combineCharacter('ㄱ', 'ㅏ', 'ㅂㅅ')) 
+console.log(combineCharacter('ㅌ', 'ㅗ')) 
+
+```
+
+</Sandpack>
+
+
+## combineVowels
+
+인자로 두 개의 모음을 받아 합성하여 겹모음을 생성합니다. 만약 올바른 한글 규칙으로 합성할 수 없는 모음들이라면 단순 Join합니다.
+
+```typescript
+function combineVowels(vowel1: string, vowel2: string): string 
+```
+
+### Examples
+
+```typescript
+combineVowels('ㅗ', 'ㅏ') // 'ㅘ'
+combineVowels('ㅗ', 'ㅐ') // 'ㅙ'
+combineVowels('ㅗ', 'ㅛ') // 'ㅗㅛ'
+```
+
+### 사용해보기
+
+<br />
+
+<Sandpack>
+
+```ts index.ts
+import { combineVowels } from 'es-hangul';
+
+console.log(combineVowels('ㅗ', 'ㅏ'))
+console.log(combineVowels('ㅗ', 'ㅐ'))
+console.log(combineVowels('ㅗ', 'ㅛ'))
+
+```
+</Sandpack>