Idu Script: The Early System of Writing Korean with Chinese Characters
Long before the creation of the modern Korean alphabet, the Korean people faced a significant linguistic challenge: how to record their spoken language using a writing system designed for a completely different language. The solution was Idu (吏讀), which literally translates to "official's reading." Developed during the Three Kingdoms period, Idu served as a vital bridge between the complex structure of the Korean language and the characters of Classical Chinese.
Idu was not a separate alphabet but a sophisticated writing system that utilized Hanja (Chinese characters) to represent the Korean language. By leveraging both the meaning and the sound of these characters, Buddhist monks and officials created a method to document native Korean words and grammatical structures that did not exist in Chinese.
[ไม่มีภาพประกอบ]Key Facts
- Origin: Developed during the Three Kingdoms period (57 BC – 668 AD).
- Primary Use: Official government documents and imperial examinations from 958 to 1894 AD.
- Mechanism: Used Hanja for both semantic meaning and phonetic sounds to represent Korean grammar.
- Structure: Written following Korean grammatical word order rather than Chinese order.
- Purpose: Enabled the recording of native Korean expressions and the clarification of Classical Chinese texts.
The Evolution and Scope of Idu
The term "Idu" is often used in two different contexts. In a broad sense, it refers to various systems used from the early Three Kingdoms through the Joseon period to represent Korean phonology via Hanja. This broader category includes hyangchal, a system used primarily for vernacular poetry, and gugyeol writing.
In a narrower, more technical sense, Idu refers specifically to the system developed during the Goryeo dynasty (918–1392). This specific iteration was first formally identified by name in the Jewang ungi.
How the Idu System Worked
The Idu script operated by blending two different uses of Chinese characters. First, it used Hanja as loanwords, where the character retained its original Chinese meaning and a pronunciation similar to the original Chinese (known as on).
Second, it used Hanja purely for their phonetic values. In these instances, the original meaning of the Chinese character was ignored, and it was used simply as a symbol to represent a Korean sound. This allowed writers to include Korean grammatical morphemes—the smallest units of language that carry grammatical meaning—which were essential for making the text read naturally in Korean word order.
Practical Applications
Beyond its role in the imperial examinations and official bureaucracy, Idu served several critical educational and administrative functions:
- Clarification: It was used to annotate Classical Chinese government documents, making them accessible to Korean readers.
- Education: It served as a tool to teach Koreans how to read and write Classical Chinese.
- Translation: It facilitated the translation of important foreign texts, such as the Ming legal code and the Essentials of agriculture and sericulture (Nongsan jiyao), the latter of which was ordered by King Taejong in 1414.
Comparative Example: From Classical Chinese to Idu
To understand the difference, consider a passage from the 1415 text Yangjam Gyeongheom Chwaryo regarding silkworm cultivation. While the Literary Chinese version is concise, the Idu transcription expands the text to fit Korean grammar and syntax.
| Format | Text/Transcription |
|---|---|
| Literary Chinese | 蠶陽物大惡水故食而不飮 |
| Idu Transcription | 蠶 段 陽物 是乎等用良 水氣 乙 厭却桑葉 叱分 喫破 爲遣 飮水 不冬 |
| Modern Korean | 누에는 양물로써, 물기를 싫어해, 뽕잎만 먹고, 물을 마시지 않는다. |
| English Meaning | Silkworm is Yang (positive) animal, it doesn't like water's gi, so it eats mulberry leaves but does not drink water. |
Frequently Asked Questions
What is the difference between Idu and Hanja?
Hanja refers to the Chinese characters themselves. Idu is a writing system that uses those Hanja characters to represent the Korean language, often ignoring the character's original meaning to use its sound for Korean grammar.
Who originally developed the Idu script?
The script was developed by Buddhist monks during the Three Kingdoms period of Korea.
When was Idu used for official government business?
Idu was primarily used for official documents and the imperial examinations from 958 AD until 1894 AD.
Did Idu follow Chinese or Korean word order?
Unlike Classical Chinese, the Idu script was written following Korean grammatical word order.
Is Idu the same as hyangchal?
In a broad sense, yes; hyangchal is one of the systems of representing Korean phonology through Hanja. However, in a narrow sense, Idu refers specifically to the system developed during the Goryeo period.